Answer:
South Carolina withdrew from the United States on December 20, 1860. At the time Abraham Lincoln was trying to stop slavery from spreading to the Western territories. Texas, Mississippi, Georgia and South Carolina all issued additional documents, usually referred to as the "Declarations of Causes" which explains their decisions to leave the Union.
Explanation:
Hopefully this helps :) I tried my best to use all my knowable on this topic.
In semiconductor manufacturing, wet chemical etching is often used to remove silicon from the backs of wafers prior to metallization. The etch rate is an important characteristic of this process and known to follow a normal distribution. Two different etching solutions have been compared using two random samples of 10 wafers for each solution. Assume the variances are equal. The etch rates are as follows (in ml per minute):
Solution 1 Solution 2
9.8 10.4 10.2 10.0
9.4 10.3 10.6 10.2
9.3 10.0 10.7 10.7
9.6 10.3 10.4 10.4
10.2 10.1 10.5 10.3
(a) Calculate the sample mean for solution 1.
(b) Calculate the sample standard deviation for solution 1.
(c) Calculate the sample mean for solution 2.
(d) Calculate the sample standard deviation for solution 2.
(e) Test the hypothesis
H
0
:
m
1
=
m
2
versus
H
1
:
m
1
â
m
2
.
Calculate
t
0
.
(f) Calculate a 95% two-sided confidence interval on the difference in mean etch rate.
Answer:
[tex](a)[/tex] [tex]\bar x_1 = 9.94[/tex]
[tex](b)[/tex] [tex]x_2 = 10.4[/tex]
[tex](c)[/tex] [tex]\sigma_1 = 0.395[/tex]
[tex](d)[/tex] [tex]\sigma_2 = 0.231[/tex]
(e) There is sufficient evidence to reject the claim that the mean etch rate is the same for both solutions
[tex](f)[/tex] [tex]-0.75644 < \mu_1 - \mu_2 < -0.1556[/tex]
Explanation:
Given
Solutions 1 and 2
Solving (a): Mean of solution 1
For Solution 1, we have the following data:
[tex]9.8\ 10.4\ 9.4\ 10.3\ 9.3\ 10.0\ 9.6\ 10.3\ 10.2\ 10.1[/tex]
The sample mean is calculated as:
[tex]\bar x = \frac{\sum x}{n}[/tex]
Where
[tex]n_1 = 10[/tex]
So, we have:
[tex]\bar x_1 = \frac{9.8+ 10.4+ 9.4+ 10.3+ 9.3+ 10.0+ 9.6+ 10.3+ 10.2+ 10.1}{10}[/tex]
[tex]\bar x_1 = \frac{99.4}{10}[/tex]
[tex]\bar x_1 = 9.94[/tex]
Solving (b): Mean of Solution 2
For Solution 1, we have the following data:
[tex]10.2\ 10.0\ 10.6\ 10.2\ 10.7\ 10.7\ 10.4\ 10.4\ 10.5\ 10.3[/tex]
The sample mean is calculated as:
[tex]\bar x = \frac{\sum x}{n}[/tex]
Where
[tex]n_2 = 10[/tex]
So, we have:
[tex]x_2 = \frac{10.2+ 10.0+ 10.6+ 10.2+ 10.7+ 10.7+ 10.4+ 10.4+ 10.5+ 10.3}{10}[/tex]
[tex]x_2 = \frac{104}{10}[/tex]
[tex]x_2 = 10.4[/tex]
Solving (c): Sample Standard Deviation of solution 1
This is calculated as:
[tex]\sigma_1 = \sqrt{\frac{\sum (x-\bar x_1)^2}{n_1-1}}[/tex]
This gives:
[tex]\sigma_1 = \sqrt{\frac{(9.8 - 9.94)^2+ (10.4- 9.94)^2+ (9.4- 9.94)^2+................+ (10.2- 9.94)^2+ (10.1- 9.94)^2}{10 - 1}}[/tex]
[tex]\sigma_1 = \sqrt{\frac{1.404}{9}}[/tex]
[tex]\sigma_1 = \sqrt{0.156}[/tex]
[tex]\sigma_1 = 0.39496835316[/tex]
[tex]\sigma_1 = 0.395[/tex] --- approximated
Solving (d): Sample Standard Deviation of solution 2
This is calculated as:
[tex]\sigma_2 = \sqrt{\frac{\sum (x-\bar x_2)^2}{n_2-1}}[/tex]
So, we have:
[tex]\sigma_2 = \sqrt{\frac{(10.2 - 10.4)^2+ (10.0 - 10.4)^2+ (10.6 - 10.4)^2+ (10.2 - 10.4)^2+.......................+ (10.3 - 10.4)^2}{10-1}}[/tex]
[tex]\sigma_2 = \sqrt{\frac{0.48}{9}}[/tex]
[tex]\sigma_2 = \sqrt{0.05333333333}[/tex]
[tex]\sigma_2 = 0.23094010766[/tex]
[tex]\sigma_2 = 0.231[/tex]
Solving (e): Test the hypothesis
[tex]H_0: \bar x_1 = \bar x_2[/tex]
[tex]H_1: \bar x_1 \ne \bar x_2[/tex]
Start by calculating pooled standard deviation
[tex]s_p = \sqrt{\frac{(n_1 - 1)*\sigma_1^2 + (n_2 - 1)*\sigma_2^2}{n_1 + n_2 -2}[/tex]
[tex]s_p = \sqrt{\frac{(10 - 1)*0.395^2 + (10 - 1)*0.231^2}{10+ 10-2}[/tex]
[tex]s_p = \sqrt{\frac{1.884474}{18}[/tex]
[tex]s_p = \sqrt{0.104693}[/tex]
[tex]s_p = 0.324[/tex]
Calculate test statistic
[tex]t = \frac{\bar x_1 - \bar x_2}{s_p\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}[/tex]
[tex]t = \frac{9.94 - 10.4}{0.324 * \sqrt{\frac{1}{10} + \frac{1}{10}}}[/tex]
[tex]t = \frac{-0.46}{0.324 * \sqrt{0.2}}[/tex]
[tex]t = \frac{-0.46}{0.324 * 0.4472}[/tex]
[tex]t = \frac{-0.46}{0.1448928}[/tex]
[tex]t = -3.175[/tex]
Calculate the degree of freedom
[tex]df = n_1 + n_2 - 2[/tex]
[tex]df = 10+10 - 2[/tex]
[tex]df = 18[/tex]
The p value is the in the column title of the student t distribution in row 18
[tex]p = 002621[/tex]
The p value is less than the significance level (0.05).
i.e.
[tex]p < 0.05[/tex]
So: Reject the null hypothesis
Solving (f): 95% two-sided confidence interval
[tex]c = 95\%[/tex]
Calculate the degree of freedom
[tex]df = n_1 + n_2 - 2[/tex]
[tex]df = 10+10 - 2[/tex]
[tex]df = 18[/tex]
Calculate [tex]\alpha[/tex]
[tex]\alpha = (1 - c)/2[/tex]
[tex]\alpha = (1 - 95\%)/2[/tex]
[tex]\alpha = (0.05)/2[/tex]
[tex]\alpha = 0.025[/tex]
Using student t distribution
[tex]t_{\alpha/2} = 2.101[/tex]
Calculate margin of error (E)
[tex]E = t_{\alpha/2} * s_p * \sqrt{\frac{1}{n_1} + \frac{1}{n_2}}[/tex]
[tex]E = 2.101 * 0.324 * \sqrt{\frac{1}{10} + \frac{1}{10}}[/tex]
[tex]E = 2.101 * 0.324 * \sqrt{0.2}[/tex]
[tex]E = 0.3044[/tex]
The boundaries of the confidence are:
[tex](\bar x_1 - \bar x_2) -E[/tex] [tex]= (9.94- 10.4) - 0.3044 = -0.7644[/tex]
[tex](\bar x_1 - \bar x_2) + E[/tex] [tex]= (9.94- 10.4) + 0.3044 = -0.1556[/tex]
The confidence interval is:
[tex]-0.75644 < \mu_1 - \mu_2 < -0.1556[/tex]
Help please it’s due it 10 mins and I don’t get it
Answer:
11) 3 branches , legislative branch, judical branch
12) ohia supreme court, makes
Explanation:
How are prices determined in a pure-market economy?
Malinowski found that the Trobriand Islanders used magic Group of answer choices as a means of increasing social solidarity. to increase the bountifulness of the yam harvest. in psychologically stressful situations, such as sailing. as a means of leveling Europeans who refused to redistribute their wealth. to kill their adversaries during intertribal warfare.
Answer:
in psychologically stressful situations, such as sailing.
Explanation:
Malinowski was an anthropologist went to the trobriand island to study the culture there. He found out that the people there used magic as practical solution to different problems that they may be having. In sailing for instance, they used magic as a form of assistance to take care of unexpected situations even as they relied on their own skills.
Which of the following describes how many of the colonies responded after the Boston massacre
Answer:
if these are the answer Boston townspeople attacked and killed five British soldiers.
British soldiers attacked and killed five Boston townspeople.
British soldiers attacked Boston townspeople, who shot five soldiers dead.
Boston townspeople attacked British soldiers, who shot five colonists dead.
Explanation:
then the fourth on
To find the most direct distance between two places on Earth, what would be the best tool to use?
A) map
B) globe
C) compass
D) atlas
Answer:
map
Explanation:
What do Mexico and Venezuela have in common?
Answer: In 2018, two-way trade between both nations totaled US$1 billion. Mexico's main exports to Venezuela include: maize, medicine, baby food, shampoo, diapers and machinery. Venezuela's main exports to Mexico include: oil, gas, aluminum and sesame seeds.
Explanation: In 2018, two-way trade between both nations totaled US$1 billion. Mexico's main exports to Venezuela include: maize, medicine, baby food, shampoo, diapers and machinery. Venezuela's main exports to Mexico include: oil, gas, aluminum and sesame seeds.
C) Both countries are exporters of oil.
Explanation:Mexico's main exports to Venezuela include: maize, medicine, baby food, shampoo, diapers and machinery. Venezuela's main exports to Mexico include: oil, gas, aluminum and sesame seeds.
Which city established the first professional police force in the United States?
A.
New York
B.
Boston
C.
Philadelphia
D.
Albany
Answer:
THE RIGHT ANSWER IS NEW YORK CITY.Option A. New York.
.....
How did the development of the Silk Road benefit the Chinese economy?
A.
It decreased the cost of exporting goods.
B.
It enabled Chinese workers to migrate to job locations.
C.
It created access to an abundant supply of raw materials.
D.
It opened new markets for Chinese producers.
Answer:
A.
It decreased the cost of exporting goods.
Can somebody help me?
Answer:
Number 1
Explanation:
How long does water stay in aquifers
Answer:
Estimated depth and residence time of the world's water supply
Soil Moisture ~2 weeks-1 year
Groundwater ~2 weeks-10,000 years
Ice caps/Glaciers 10-1000 years
Atmospheric water ~10 days
Answer:
2 weeks-10,000 years
Explanation:
Two ways in which women and children can be protected from discrimination and violence
The two ways that women and children can be protected from discrimination and violence are:
Creation of laws that prohibits such activities.Sensitizing the public.What is discrimination?This is the bias against people due to the fact that the person thinks that they are inferior or they are not up to their standards.
Women and children have been subjects of discrimination for a very long period of time. They have also being targets of violence due to the fact that they are considered the weak gender.
Read more on discrimination here:https://brainly.com/question/1084594
The large percentage of arable land is most helpflu to which industry in Cuba?
Your answer:
agriculture
manufacturing
tourism
Answer:
Manufacturing
Explanation:
Mention THREE reasons why the ability to adapt to change is important for improvement of your quality of life
1: Because if we don't change our habits than we can't change ourselves
2: Because if we don't change than we can't change for the better
3: It's so we can't be better
Adaptability is defined as the ability to adapt, change, and respond to the environment and work situations.
Three Reasons To Adapt To Change
Adaptability is the ability to expand capacity to handle change, variation, and certain situations. The ability to change will improve oneself chances for growth, opportunities, and promotions at the workplace. Adaptibility brings satisfaction, happiness, and courage to the overall quality of life.
Thus, the ability to certain situations is necessary to improve the quality of life.
Learn more about adaptability, refer to the following link:
https://brainly.com/question/12534888
Are spiders social animals?
Answer:
depends on the specie and age
Explanation:
spiders tend to be aggressive towards eachother and as they grow older they become less social
100 pionts HURRY??!?!?!?
How did the United States and Western European nations try to help Germany recover from economic collapse after World War I?
Answer:
The United States and Germany signed a separate peace treaty in 1921 and a trade treaty in 1923. The Dawes Plan presented in 1924 was designed to help Germany pay its World War I reparations debt.
How do countries invest in capital goods
Answer:
below
Explanation:
Capital investment occurs when businesses purchase capital goods, which are tangible assets such as buildings, machinery, equipment, vehicles, and tools. These tangible assets are then used to produce goods or services. Capital investment is a means for a company to further its business objectives.
If a determined hunting supplier finds there are many others supplying goods for hunting, how could specialization help to improve his business?
A. The hunting supplier could focus on a specific product for hunting.
B.The hunting supplier could relocate to an area with fewer hunters.
C. The hunting supplier could increase the number of products he supplies.
D. The hunting supplier could sell supplies for another recreational sport instead.
Plz help
Answer:
the answer is A it Mack's sens
Answer:
A on edge 2020
Explanation:
HELP IF U HELP U GET BRAINLIEST ANSWER THIS IS 30 POINTS
Answer:
introducing tax cuts to stimulate the economy
PLEASE CLICK ON THIS IMAGE I NEED HELP
Answer:
The Old Egyptian Kingdom
Explanation:
The Old Kingdom built pyramids like the Great Pyramid at Giza, the Sphinx, and the Pyramid of Djoser. The Old Kingdom was also called the Age of the Pyramids. The 4th Dynasty of the Old Kingdom brought changes in the centralized government which later became necessary for building projects. It was during the 5th and 6th century gave rise to the great pyramids.
How would I describe a Tornado and what causes this type of tornado weather ?
Answer:
Tornadoes form when warm, humid air collides with cold, dry air. The denser cold air is pushed over the warm air, usually producing thunderstorms. The warm air rises through the colder air, causing an updraft. The updraft will begin to rotate if winds vary sharply in speed or direction.
In an experiment examining the effects of size of plate on amount of food eaten, one group of participants is measured after eating food on 12 inch plates. A week later, the same group of participants is measured after eating food on 10 inch plates. This is an example of a ____ design.
Answer:
Within subject
Explanation:
A within study design is also called the repeated measures design. Here we use the same participants twice or more to test the same condition. Every one on the participants are made to test all conditions.
From this question, we can see that same group of participants participated twice in the study, first after eating on 12 inch plate, secondly after using the 10 inch plate.
Why are people are more serious in population management in comparison of previous day ?
Answer:
Because of the rapid growth increase was mainly caused by a decreasing death rate (more rapidly than birth rate), and particularly an increase in average human age.
Explanation:
1.4
"Sometimes conflict can be healthy". Critically discuss this statement
Answer:
yes because you may know or learn what you did not know from tha conflict and I personally think that it is good something to screem something not everyday
Conflict can be healthy at times because when controlled, it leads to strengthen relationships, teams and leads to better solutions and growth.
A Conflict refers to a deliberate action where one person or group attempts to thwart the actions of another
Even at workplaces, controlled conflict are seen as necessary to build a healthy part of personal and professional relationships
In conclusion, a conflict can be healthy at times because when controlled, it leads to strengthen relationships, teams and leads to better solutions and growth.
Read more about Conflict
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I need help now please
Ghana colonial master were called
Answer:
general Abu Bakar Ibn Umar
A researcher performs an experiment to test the hypothesis that the hormone oxytocin plays an important role in falling in love. In this experiment the researcher measures the oxytocin levels of men and women, and then introduces them to complete strangers. An hour later she asks the subjects of the experiment whether or not they would like to go out on a date with the person to whom they were introduced an hour previously. She finds that the people with the high oxytocin levels were more likely to want to go out on that date than people with low oxytocin levels.
A. Men and Women
B. Whether or not people would like to go out on a date
C. None for this experiment
D. Levels of oxytocin in each individual
For each letter, match the following:
1) Experimental Group
2) Control Group
3) Independent Variable
4) Dependent Variable
Answer:
The answers are:
1) Experimental Group = Men and Women
2) Control Group = None for this experiment
3) Independent Variable = Levels of oxytocin in each individual
4) Dependent Variable = Whether or not people would like to go out on a date
Explanation:
There are some terms associated with scientific experiments. Let me explain each of the terms as captured in the question:
1. Experimental Group: The experimental group in scientific research refers to the group on which an intervention or a factor causing changes to be studied is carried out. In this example, the men and women whose oxytocin levels were measured forms the experimental group, because they fulfilled certain criteria (having certain measurable level of oxytocin) hence they are qualified for studies to be carried out on them.
2. Control Group: The control group is absent in this experiment, but ideally it is the group that possesses every other similar characteristic as the experimental group except for the factor causing the change that is being studied. They serve as a baseline to ensure that the changes noticed are caused by the experimental factor alone.
3. Independent Variable: These are variables whose value are predetermined or preconceived before the start of the experiment. They are the variables whose presence cause an outcome that is measured. In this example, levels of oxytocin are the independent variable.
4. Dependent Variable: the dependent variable is the variable that take on values/outcomes based on the effect of the independent variable.The dependent variables are not under the direct manipulation of the experimenter but have their outcome from the manipulation of the independent variable.
The hyperfocus on crime among athletes is limited to what two sports?
The correct answer to this open question is the following.
Unfortunately, you did attach further context or references.
However, we can comment on the following.
The hyperfocus on crime among athletes is limited to these two sports: football and basketball.
The reason why is that these two sports produce too many "stars" that have too much notoriety for their conduct and behaviors. Some of the athletes that participate in these professional sports got too much attention from the media and the public and are considered famous. This popularity often produces that they lost the ground and act in incongruent ways, many times making the worts decisions that impact their careers by the mistakes they make.
As the public figures they are, their behavior immediately makes the news, and their poor judgment often brings negative consequences to their careers.
Discuss TWO ways in which some cultural views that exist may affect
a relationship negatively.
(2 x 2 =
Answer:
cultural view can affect a relationship both negative and positive ways
Explanation:
we should take care of our culture.We can predict the quality of the community by understanding the culture of the community.Relationships between various people from the same cultural and having. different racial norms complex enough for the problem arising
The pursuance of the belief that Man is higher then Women and that people must have his/her religion are example of cultural views that can affect a relationship negatively.
What is a cultural views?A cultural views refers to individual's opinions and beliefs on social, religious and traditional aspects of society.
The cultural view that influence the racial differences can also deteriorate the relationship between diverse races.
However, the way through which cultural views may affect relationship negatively includes the pursuance of:
the belief that Man is higher then Womenthat people must have his/her religion.In conclusion, all these notions are what can may affect a relationship negatively.
Read more about Cultural views
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Please don’t make a inproper answer or a funny, silly and anoying answer.
Ok what are 5 jobs that depend on natural resources found in the southeast . It is worth it for the points. If I like your answer you will be marked brainlest. Also please explain how it depends on natural resources
Answer:
1. Tech Job Outlook: Computer Systems Analyst
2. Administrative Job Outlook: Market Research Analyst
3. Logistics Job Outlook: Machinists
4. Healthcare Job Outlook: Home Health Aide
5. Service Job Outlook: Medical Equipment Repairers
Explanation:
.