A researcher is testing the claim that the average university student works less then 15 hours a week. To test this claim she surveys a random sample of 20 undergraduate students who reported an average of 13.5 hours a week of work. We will assume that the population is normally distributed with a standard deviation of 5 hours per week.



Test this claim at the alpha of 0.02 by calculating the z-score and comparing it to the critical z-score (z subscript c r i t end subscript equals negative 2.05 right parenthesis.

You have the standard error of the mean, so solve for the z-score.

Answers

Answer 1

Answer:

no

Step-by-step explanation: pick up the phone baby i know your home


Related Questions

the exact value of 5.2 billion ÷100 is
(use scientific notation, round to three decimal places as needed)

Answers

The answer is:

5.2 x 10^7 or 52,000,000

Sloan was told to written paper of a science experiment should Express measurements and leaders 1.26 gallon 11.05 courts 14.2 to cups which shows how to calculate the number of liters he use if he use 5 cups of water divided by 5 4.22 divide 5 by 1.05 or multiply 5 by 1.05

Answers

Answer:

Multiply 5 by 4.22 because 5 cups of water is 4.22 liters

Multiply 5 by 4.22 because 5 cups of water is 4.22 liters.... I think

Stacy goes to the county fair with her friends. The total cost of ride tickets is given by the equation c = 3.5t, where c is the total cost of tickets and t is the number of tickets. What would Stacy spend if she bought 15 tickets?

Answers

Answer:

$52.50

Step-by-step explanation:

C = 3.5t

C = 3.5 (15)

3.5 × 15 = 52.5

C = $52.50

round 496,804 to the nearest hundred thousand.

Answers

Answer:

500,000

Step-by-step explanation:

You have a 9 in the ten thousand, round up and get 500,000

WILL MARK BRAINLIEST Given a the line y=2.5x+4, find line whose graph: b intersects with the graph of the given line.

Answers

Your equation will be y=4x-1 and the intersection point will be (2,9). Hope this helps!

The aquarium where Fred works has a special tank for the baby sharks. The tank is shaped
like a rectangular prism and is 18 meters long by 15 meters wide. It is 8 meters from the
bottom of the tank to the top. What is the volume of the shark tank?

Answers

the answer is instruments that detect earthquakes

1. (12 points) The tennis team at Taft High School has 8 players, and the tennis team at McKinley High School has 7 players. Rebecca is on the team at Taft, and her sister Leah is on the team at McKinley. The two teams are going to play a tournament with 4 rounds. In each round, one player from Taft will play a match against one player from McKinley. Each player can play in at most one match. A schedule for the tournament consists of an ordered list of the names of the players from each school who will play in each of the four rounds. The schedule does not include the results of each match. (a) How many schedules are there? (b) How many schedules include neither sister? (c) How many schedules include both sisters and have them playing against each other? (d) How many schedules include both sisters, but have them playing in different matches?

Answers

Answer:

(a) 1,411,200.

(b) 302,400.

(c) 100,800.

(d) 1,008,000.

Step-by-step explanation:

Permutation is the number of ways to select k items from n distinct items in a specific order.

The formula to compute the permutation or arrangement of k items is:

[tex]^{n}P_{k}=\frac{n!}{(n-k)!}[/tex]

(a)

Compute the total number of schedules as follows:

[tex]\text{Total Number of Schedules}=\ ^{8}P_{4}\times \ ^{7}P_{4}[/tex]

                                          [tex]=\frac{8!}{(8-4)!}\times \frac{7!}{(7-4)!}\\\\=\frac{8\times 7\times 6\times 5\times 4!}{4!}\times \frac{ 7\times 6\times 5\times 4\times 3!}{3!}\\\\=(8\times 7\times 6\times 5)\times (7\times 6\times 5\times 4)\\\\=1411200[/tex]

Thus, the total number of schedules are, 1,411,200.

(b)

Compute the number of schedules that includes neither sister as follows:

If neither of sister are included in the schedule then the number of players from the team are 7 and 6 respectively.

[tex]\text{Number of Schedules without the sisters}=\ ^{7}P_{4}\times \ ^{6}P_{4}[/tex]

                                                               [tex]=\frac{7!}{(7-4)!}\times \frac{6!}{(6-4)!}\\\\=\frac{ 7\times 6\times 5\times 4\times 3!}{3!}\times \frac{ 6\times 5\times 4\times 3\times 2!}{2!}\\\\=(7\times 6\times 5\times 4)\times (6\times 5\times 4\times 3)\\\\=302400[/tex]

Thus, the number of schedules that includes neither sister is 302,400.

(c)

Compute the number of schedules including both sisters and have them playing against each other as follows:

If both the sisters are playing against each other then there will be three more places to be filled in both the teams.

And the two sisters can play in any of the 4 matches.

[tex]\text{number of schedules including} \\\text{both sisters against each other}=(\ ^{7}P_{3}\times \ ^{6}P_{3})\times 4[/tex]

                                                [tex]=[\frac{7!}{(7-3)!}\times \frac{6!}{(6-3)!}]\times 4\\\\=[\frac{ 7\times 6\times 5\times 4!}{4!}\times \frac{ 6\times 5\times 4\times 3!}{3!}]\times 4\\\\=[(7\times 6\times 5)\times (6\times 5\times 4)]\times 4\\\\=100800[/tex]

Thus, the number of schedules including both sisters and have them playing against each other is 100,800.

(d)

Compute the number of schedules including both sisters as follows:

[tex]\# \text {Schedules with the Sisters}=\text{Total}\ \#\ \text{Schedules }-\ \# \text {Schedules without the Sisters}[/tex]                                             [tex]=1411200-302400\\=1108800[/tex]

Now compute the number of schedules having the sisters playing in different matches as follows:

[tex]\text{Playing in Different Matches}=\# \text {Schedules with the Sisters}-\text{Playing together}[/tex]

                                              [tex]=1108800-100800\\=1008000[/tex]

Thus, the number of schedules including both sisters, but have them playing in different matches is 1,008,000.

a withdrawal of $225

Answers

Answer:

ok bro

Step-by-step explanation:

To find 2.43 x 7.5, multiply__*_. Then, place the decimal point in the product to show
decimal places. PLEASE BRAINILY HELPPP

Answers

Answer:

16.825 is the answer for your question

7 is a solution to the equation 3n + 9 = 33. true false

Answers

Answer:

No

Step-by-step explanation:

3n+9=33

    -9=-9

3n= 24

3n/3=24/3

n=8

Answer:

False

Step-by-step explanation:

What is the image of point (0,2) after a rotation of 90° counterclockwise about the origin?

Answers

Answer:

(-2,0)

Step-by-step explanation:

remember the rule for 90 degree clockwise is (-y,x) opposite y and x

the negative in there DOES NOT mean it will always be negative it means opposite but in this case yes it's negative because the opposite of positive is negative

Hope this helps dude, I'm also learning this in online school lol. ^-^

The image of point (0,2) after a rotation of 90° counterclockwise about the origin is (-2, 0).

The given coordinate point is (0, 2).

What is rotation rule of 90°?

Here are the rotation rules: 90° clockwise rotation: (x, y) becomes (y, -x) 90° counterclockwise rotation: (x, y) becomes (-y, x) 180° clockwise and counterclockwise rotation: (x, y) becomes (-x,-y).

The rule of 90° counterclockwise rotation: (x, y) becomes (-y, x), here

(-2, 0)

Therefore, the image of point (0,2) after a rotation of 90° counterclockwise about the origin is (-2, 0).

Learn more about the rotation of 90° counterclockwise here:

https://brainly.com/question/1571997.

#SPJ2

Find f(-5) × f(-3) f(x) = - x - 12

Answers

Answer:

63

Step-by-step explanation:

Step 1: Define

f(x) = -x - 12

f(-5) is x = -5

f(-3) is x = -3

Step 2: Find f(-5)

f(-5) = -(-5) - 12

f(-5) = 5 - 12

f(-5) = -7

Step 3: Find f(-3)

f(-3) = -(-3) - 12

f(-3) = 3 - 12

f(-3) = -9

Step 4: Find f(-5) × f(-3)

-7 × -9

63

I put a pic of question here. I'm in 8th grade

Answers

y = 115

x = 78

The angles in each line have to add up to 180. In this case, it doesn't show the other side of the angle, but you could probably think of it.

g The number of individuals arriving at a food pantry in a small city averages eight per day. Assume the Poisson distribution. What is the probability that, on any given day, there will be 9 individuals arriving at the food pantry

Answers

Answer:

The probability that on any given day, there will be 9 individuals arriving at the food pantry is 0.1241

Step-by-step explanation:

Here, we are to use Poisson distribution probability formula

Please check attachment for detailed explanation

Karen invests $2,400 into an account with a 6.8% interest that is compounded annually. How much money will she have in this account if she keeps it for 8 years? Round your answer to the nearest cent. Do NOT round until you have calculated the final answer.

Answers

Answer:

The answer is 4062.39

Step-by-step explanation:

A=$2,400(1+0.0681)1(8). Simplify using the order of operations: A=$2,400(1.068)8=$2,400(1.692661131)≈$4,062.39.

The amount of money after 8 years will be $4062.38.

What is compound interest?

In order to compute compound interest, multiply the principle of the original loan by the annual interest rate multiplied by the number of compound periods minus one. You will then be left with the principal amount of the loan plus compound interest.

Given that Karen invests $2,400 into an account with a 6.8% interest that is compounded annually. The amount after 8 years will be calculated as below:-

Amount = P [ 1 + ( r / n )]^(nt)

A = final amount

P = initial principal balance

r = interest rate

n = number of times interest applied per time period

t = number of time periods elapsed

Amount = 2400 [ 1 + ( 0.068 / 1 ) ] ⁸

Amount = 2400 [1.068 ) ] ⁸

Amount = 4062.38

Therefore, the amount of money after 8 years will be $4062.38.

To know more about compound interest follow

https://brainly.com/question/24924853

#SPJ2

Can someone pls help me?!?

Answers

Answer:

Step-by-step explanation:

If the sum of the two given angles is 5 + 10 = 15 then the third side cannot be larger than 15. If it is, the two given angles will fall flat on the third angle.

If the third angle is less than 5 then the sum will be less than 10 and the same thing will happen as described above.

So the correct answer is B

Simplify -|-5 + 2|
7, 3, -7,-3

Answers

Answer:

-3

Step-by-step explanation:

-|-5+2|
= -|-3|
The absolute value of -3 is 3 itself
So
= -3

On Friday, Andre biked 60 miles in 4 hours at a constant rate. On Saturday, he biked at a rate that was 4 mph slower. What was his rate on Saturday?

A. 4 MPH
B. 11 MPH
C. 15 MPH
D. 16 MPH

Answers

Answer:

B. 11 MPH

Step-by-step explanation:

60/4=15

15-11=4

B because 60/4 is 15. That’s the first part then, 15-4 is 11

Write the equation of the line that contains the points (5,7) and (5, -12):

Answers

Step-by-step explanation:

Well you first have to find the slope, which is y2-y1/x2-x1

Which is -12-7/5-5 and that equals to undefined.

So since you can't find the slope the answer should be undefined.

Hope this helps <3

Complete the table to find solutions to the linear equation y=-10x+30

Answers

what are the x’s and y’s

f(x)=-4x²-6x-1and g(x)=-x²-5x+3 find (f+g)(x)

Answers

[tex](f + g)(x) = - 4 {x}^{2} - 6x - 1 - {x}^{2} - 5x + 3 \\ [/tex]

[tex](f + g)(x) = - 5 {x}^{2} - 11x + 2 \\ [/tex]

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

Which of the following graphs represents the equation y=2x−3?

Answers

Answer:

D. (the one in the right hand bottom corner)

Answer:

Bottom right

Step-by-step explanation:

The equation is y = 2x - 3

2 represents the slope

-3 represents the y-intercept

The y-intercept is when x = 0

So first, we look at the graphs and find the graphs that display when x = 0, y = -3 aka (0, -3)

From this, we can deduce the two graphs on the left side are wrong

It must be the two on the right

Now we figure out which one has a slope of 2 aka rise over run = 2/1

Which graph goes up (rises) 2 units and goes forward (runs) 1 unit?

The top right graph depicts a slope of 1/2, not 2/1 so this is incorrect

The bottom right graph displays a slope of 2/1 aka 2

Bottom right graph is the correct answer

here is the question.​

Answers

Answer:

the answer of the question is 7

A radio transmission tower is 180 feet tall. How long should a guy wire be if it is to be attached 8 feet from the top and is to make an angle of 22° with the ground? Give your answer to the nearest tenth of a foot.

Answers

Answer:

453.95 feet exactly

Step-by-step explanation:

In a batch of ​pedometers, are believed to be defective. A​ quality-control engineer randomly selects units to test. Let random variable Xthe number of defective units that are among the units tested. The probability mass function ​f(x)​P(X​x) is given below. ​f(x)​{(0,​), ​(1,​), ​(2,​), ​(3,​)} Recall that the mean of a discrete random variable X with probability mass function ​f(x)​P(X​x) is given by . Find for the probability mass function above. What does this number​ represent?

Answers

Answer:

The mean for the probability mass function is 0.64287.

Step-by-step explanation:

The complete question is:

In a batch of ​28 pedometers, 3 are believed to be defective. A​ quality-control engineer randomly selects 6 units to test. Let random variable X = the number of defective units that are among the units tested.

The probability mass function ​f (x) is:

f (x)​ = {(0, 0.47009​), ​(1, 0.42308​), ​(2,​ 0.10073), ​(3, 0.00611​)}

Solution:

The mean of a discrete random variable X with probability mass function f (x) is:

[tex]\mu=\sum\limits^{n}_{x=1}{x\times f(x)}[/tex]

Compute the mean for the probability mass function above as follows:

[tex]\mu=\sum\limits^{n}_{x=1}{x\times f(x)}[/tex]

  [tex]=(0\times 0.47009)+(1\times 0.42308)+(2\times 0.10073)+(3\times 0.00611)\\=0+0.42308+0.20146+0.01833\\=0.64287[/tex]

Thus, the mean for the probability mass function is 0.64287.

This values represents the expected number of defective units for every 6 units tested.

What is the answer please I need it

Answers

its either c or d but im pretty sure its d. sorry if this doesn’t help

cubbed square root of 512x^6 is 8x^2

factor 4x^2 -6w+2x-12xw

Answers

Answer:

2(2x+1)(x-3w)

We could break this up into
(4x^2 - 6w) + (2x - 12xw)
The only thing the first term has in common is a 2. The second term has a 2 and an x in common. So:

2(2x^2 - 3w) + 2x(1 - 6w)

3/4 ( 1/2× -12) + 4/5

Answers

Here is the problem written out along with the answer in a fraction.

A TV is 20% off the original price amount is $180. What is the original amount?​

Answers

Answer: $200

Step-by-step explanation: $200=100% so then $200-20%=$180=80%

Answer:

9005

Step-by-step explanation:

180$ divided by 20% is 900$  

What is the answer for number 11

Answers

Answer: C

Step-by-step explanation: First you have to do y-y÷x-x. So first you do 2-3 which gives you -1. Then you do 6-4 which gives you 2. Then you divide -1÷2 which gives you -0.5x. Now you know it's either C or D because it's negative. For the y-intercept, you have to plug in one of the ordered pairs to y and x using the slope-intercept form.

Other Questions
Compare What do complex organismshave that makes them different from simpleorganisms? What is the first component to install in steel stud framing system? Tony needs to purchase 3,600 oz of vegetable oil for his catering business. For the containers shown in the table, how much would he save by purchasing those with the lowest unit price than those with the highest unit price?Total amount at lowest price: Total amount at highest price: Amount saved: Please help me with this it kinda complicated In what ways are Confucianism and Taoism more of a social philosophy rather than organized religions? Who held the most power in ancient Egypt The area of a square is given by A= s2 where s is the length of each side of the square if the area of a square room is 64 square meters what is the length of 1 side of the room in meters What caused the great economic inequality between the rich and poor during the Progressive Era? People who remained on farms were stuck in poverty. Urban factory workers had to live in crowded tenements. Business owners did not share profits with their employees. There was a large wave of people emigrating from poorer countries. An atom contains 15 electrons. How many energy levels would it have? How do u set up a Wi-Fi network on Android A delivery service defines a "package" as a parcel for the sum of the length and the girth is less than 70 in (length is the longest side of the package and the girth is the distance around the other two sides of the package) a box has a fixed girth of 24 in. Determine those lengths for which the box is considered a "package" Match each description to the appropriate type of government. Help me with the lesson performance task please !!!! 1. What early African civilizations did agriculture give rise to? Express each number as a single-digit integer times a power of 10.24,755,183,009,522 I WILL GIVE BRAINLEIST PLEASE HELPThe height of a golf ball hit in the air is modeled by the equation (t)=16t2 + 48t, where (t) representsthe height, in feet, and t represents the number of seconds that have passed since the ball was hit.Complete the statement about the function for (2)=32If (2)=32 , then the ball reached a height of _________ feet after _________ seconds. ExplainYou can't always get what you want . Which of the following was NOT an invention of the Mesopotamians?A. The wheelB. The plowC. WritingD. Horse-drawn buggy Select and Predict In the case of the drought in the deer habitat in question 3,select a density-dependent factor and predict what effect it will have on the deerpopulation. HEY CAN ANYONE PLS ANSWER MY MATH QUESTION RQ!!!!!!!1