The question is incomplete. Here is the complete question.
USA Today reported that 36% of adult drivers admit that they often or sometimes talk on a cell phone when driving. This was based on a random sample of 1004 adult drivers.
a) What is a 90% confidence interval for the true proportion of adult drivers who have often or sometimes talk on a cell phone when driving?
b) What is a 95% confidence interval for the true proportion of adult drivers who have often or sometimes talk on a cell phone when driving?
c) What is a 99% confidence interval for the true proportion of adult drivers who have often or sometimes talk on a cell phone when driving?
d) What do you notice?
Answer and Step-by-step explanation: The way to calculate confidence interval for proportions is by using the following formula:
[tex]z(\sqrt{\frac{p(1-p)}{n} } )[/tex]
where
p is the sample population proportion
n is the number of individuals in the sample
z is z-score associated of the % of confidence
a) A 90% confidence has a z-score of z = 1.645
Calculating:
Interval = [tex]1.645(\sqrt{\frac{0.36(1-0.36)}{1004} } )[/tex]
Interval = [tex]1.645(\sqrt{0.00023} )[/tex]
Interval = [tex]1.645(0.01515)[/tex]
Interval = 0.025
A 90% Confidence interval for true population is between 0.335 and 0.385.
b) A 95% confidence has a z-score of z = 1.96
Since the sample parameter didn't change, the interval will be:
Interval = 1.96(0.01515)
Interval = 0.03
For a 95% confidence, interval is between 0.33 and 0.39.
c) A 99% confidence has a z-score of z = 2.58
Interval = 2.58(0.01515)
Interval = 0.39
For a 99% confidence, interval is between -0.03 and 0.75
d) Confidence interval tells you how certain your results from polling or survey would represent the real population's behaviour. In the experiment above, as the percentage of certainty grows, closer the real population proportion actually is for adult drivers who often or sometimes talk on a cell phone when driving.
Which statement about g(x) = x^2 - 576 is true?
Answer:
The second option.
Step-by-step explanation:
Let's see if this will work.
(x+24)(x-24)
Let's open the brackets
x^2 - 24x +24x - 576
= x^2 - 576
Please give brainliest
I hope you understand. If you don't. Please, leave a comment below.
Make a Matlab script to make row 2 of matrix A equal to first row of A multiplied by the negative of the first element of row 2 plus the original row 2.
A= [2 -1 10]
[-3 8 4]
Answer:
[tex]X=\begin{Bmatrix}2& 1 &10 \\-3 & 5 & 4\end{Bmatrix}[/tex]
Step-by-step explanation:
From the question we are told that
Matrix is given as [tex]A=\begin{Bmatrix}2 & -1 & 10\\-3 & 8 & 4\end{Bmatrix}[/tex]
Generally let the change in matrix be given as X
[tex]X_1_2 = 2*(-(-1)) + - 1 = 1X_2_2 = -3 * (-(-1))+ 8 = 5[/tex]
Matlab output
[tex]A=[2 -1 10;-3 8 4]\\a=(A(1,1)*-A(1,2))+A(1,2)\\b=(A(2,1)*-A(1,2))+A(2,2)\\X=[A(1,1) a A(1,3); A(2,1) b A(2,3)]\\[/tex]
Generally the matrix that makes row 2 of matrix A equal to first row of A multiplied by the negative of the first element of row 2 plus the original row is
[tex]X=\begin{Bmatrix}2& 1 &10 \\-3 & 5 & 4\end{Bmatrix}[/tex]
can someone help me with this??
Answer:
34 minutes: 22[tex]\frac{2}{3}[/tex] miles 1 hour: 40 miles
Step-by-step explanation:
First, find how far it will travel in 1 minute. This will make it easier to find the other distances. Use cross multiplication.
2[tex]\frac{1}{3}[/tex] miles 3[tex]\frac{1}{2}[/tex] minutes
? miles 1 minute
? = 2[tex]\frac{1}{3}[/tex] × 1 ÷ 3[tex]\frac{1}{2}[/tex]
= 2/3 miles in 1 minute
34 minutes?
2/3 × 34 = 22[tex]\frac{2}{3}[/tex] miles
1 hour (60 minutes)?
2/3 × 60 = 40 miles
A group of preschoolers has 8 boys and 24 girls what is the ratio of girls to boys
Answer:
1:3 (Boys : Girls)
Step-by-step explanation:
8/24 = 1/3 (divide by 8)
Answer: 1:3
Step-by-step explanation:
1:3
5)
5 m
5 m
3 m
4 m
What is the surface area
Answer:
i think its 94m^2
Step-by-step explanation:
PLEASE HELP ASAP !!!!!!!!
Answer:
D
Step-by-step explanation:
Uhhh this needs to be 20 characters
Answer:
D. There are 30 grams of protein in 6 tablespoons of peanut butter.
What is the slope of the line that contains these points?
Answer:
-1 or 1/-1
Step-by-step explanation:
Answer:
the answer is -1 hope this helps ت︎シ︎☽︎❣︎
Fake Question So It Doesnt Get Taken Down, What is 40992981x9977, Real Question, How do I change my pfp?
go to where the bell is and where it says "ask question" and then do you see your little icon thingy? right there, click it. hit edit profile. and then
it shoulld say this
Edit your profile
Preferences
Send info to email
Password
Your email
Profile picture
hit profile picture and boom it says upload and all that
Answer:
go to Edit your profile
Step-by-step explanation:
find the sum of 3748 and 3242
Answer:
3748-22
3242-12
I think pls mark brainlist!
According to a survey of workers,2/20 of them walk to work, 1/20 bike, 4/20 carpool,13/20 and alone. What percent of workers walk or bike to work?
Lotsa Boats requires a deposit of $50 plus payment of $15 an hour for each hour for which the boat is rented. Which equation could be used to find the number of hours h the Johnsons rented the boat for if the required advance payment was $125?
Answer:
$50 + $15 (5) = $125
Step-by-step explanation:
first subtract $50 from $125 then divide that answer by $15
Express In 32 - In 8 as a single natural logarithm.
In 4
In 24
In 256
Answer: In 4
Step-by-step explanation: 8*4=32
or
32;8=4
The simplified form for the expression ln 32 - ln 8 is ㏑ 4.
What is Natural Logarithms?Logarithms are generally inverse functions of the exponential functions. There are 2 main logarithms that we deal with. Logarithms with base 10 and logarithms with base [tex]e[/tex].
Logarithms with base [tex]e[/tex] is called Natural logarithms.
[tex]log_e[/tex] = ㏑
Given expression is ㏑ 32 - ㏑ 8.
We have to know the rule for logarithms to solve this.
We have the division rule of logarithms which states that,
㏑ (a / b) = ㏑ a - ㏑ b
Here, a = 32 and b = 8.
㏑ 32 - ㏑ 8 can be written as,
㏑ 32 - ㏑ 8 = ㏑ (32 / 8)
= ㏑ 4
Hence the simplified form is ㏑ 4.
Learn more about Natural Logarithms here :
https://brainly.com/question/30085872
#SPJ7
A car travels about 224 miles on 7 gallons of gas. About how far can the car travel on 12 gallons of gas?
Answer:
About 384 miles (correct me if I'm wrong but I think that's the answer)
Determine if the sequence below is arithmetic or geometric and determine the common difference / ratio in simplest form. 125, 25, 5, .. ..
Answer:
Given sequence is an arithmetic sequence.
Step-by-step explanation:
Given sequence is:
125, 25, 5, .. ..
Here
[tex]a_1 = 125\\a_2 = 25\\a_3 = 5[/tex]
A sequence is geometric sequence when the common ratio of consecutive terms is same. It is denoted by r.A sequence is an arithmetic sequence when the common difference of consecutive terms is same. It is denoted by d.Finding the common ratio
[tex]r = \frac{a_2}{a_1} = \frac{125}{25} = 5\\r = \frac{a_3}{a_2} = \frac{25}{5} = 5[/tex]
As we can see that the common ratio is same, the given sequence is a geometric sequence.
Answer:
this is a geometric sequence and the common ratio is equal to 1/5.
Step-by-step explanation:
13/14% of a quantity is equal to what fraction of the quantity. simplify your answer
Answer:
=1
Step-by-step explanation:
multiply the numerator and denominator by common integer
I NEED HELP! Reflections! Please and thank you.
When reflecting across the x axis, the x values remain the same and the y values become the opposite of the original.
P' = (0,-3)
F' = (4,-2)
M' = (2,3)
Q' = (-2,2)
Rectangle ABCD is graft in the coordinate plane. The following are the verticals of the rectangle A(2,0) B(6,0) C(6,7) D(2,7)
What is the rectangle of ABCD?
Answer:
28 unit^2
Step-by-step explanation:
The computation of the area of the rectangle is shown below:
As we know that
The Area of the rectangle is
= Length × width
Give that
The verticals of the rectangle A(2,0) B(6,0) C(6,7) D(2,7)
For AB
= 6 - 2
= 4
And, for CD, 7
So, the area of the rectangle ABCD is
= 4 × 7
= 28 unit^2
When you wash your hands, the faucet uses 1/3 of a gallon of water in 30 seconds. If it takes you a minute and a half to wash your hands, how much water will you use?
Answer:
3/3
Step-by-step explanation:
if 1/3 means 30 sec. then 3/3 would be a 1 min. and 30 sec
PLSSSSSSSSSSSSSSSSSSSSSSSS HELP ME!!
The direct proportion y=kx is given in the following table. Find the coefficient k, and fill in the table:
Answer:
For the top table:
[x] | 3.1 | 2.5 | 1.2 | 0.9 | 0.14 | 0.06 | 0.02 |
[y] | 15.5 | 12.5 | 6 | 4.5 | 0.7 | 0.3 | 0.1 |
For the bottom table:
k = 5
[x] | 3.1 | 2.5 | 1.2 | 0.9 | 0.14 | 0.06 | 0.02 |
[y] | 15.5 | 12.5 | 6 | 4.5 | 0.7 | 0.3 | 0.1 |
what number is 10% of 20
Answer:
You just move the decimal so 2
Step-by-step explanation:
I believe it’s D but I’m not sure please help this are my last points
The last traffic light before Maud gets home has a 44% chance of being green when she reaches it. Let I
be the number of times Maud reaches the traffic light before she has to stop at it. Assume that each time is
independent of the others.
Find the mean and standard deviation of T.
Round your answers to one decimal place.
Answer:
Mean = 1.8 times
Standard Deviation = 1.2 Times
Step-by-step explanation:
Carrie recorded the temperature outside her school at the same time each day for four days. On Monday, the temperature was 11 degrees. On Tuesday, the temperature was 15 degrees less than the temperature on Monday. The temperature on Tuesday was ____ (choices 4 degrees, -4 degrees, 16 degrees)?
The temperature on Wednesday was 3 degrees greater than the temperature on Tuesday.
The temperature on Wednesday was ________ ( -1 degrees, -4, 1 degrees )?
On Thursday, the temperature was 4 degrees greater than the temperature on Wednesday.
The temperature on Thursday was ________ ( -6 degrees, 6 degrees, 3 degrees )?
What was the difference in degrees Fahrenheit between the temperature on Monday and the temperature on Wednesday?
The difference in temperature is ____ degrees.
Carrie also recorded the temperature outside her school on Friday. She calculated that the mean temperature for the 5 days, Monday through Friday was 2 degrees. What was the temperature in degrees Fahrenheit on Friday? Show or explain how you got your answer.
Please help me with my homework! Thank you!
PLEASE SOMEONE THIS FAST PLEASE :-)
THE FIRST ANSWER I WILL GET I WILL MARK BRAINLEST THANKS :-)
Answer:
[tex]sin^-^1(\pi x)[/tex]
Step-by-step explanation:
Please mark as Brainliest!!!Use this graph of y = -2x - 8x- 3 to find the vertex. Decide whether the
vertex is a maximum or a minimum point.
-5
A. Vertex is a minimum point at (-2,5)
B. Vertex is a maximum point at (5,-2)
C. Vertex is a maximum point at (-2,5)
D. Vertex is a minimum point at (0, -3)
Answer:
Vertex is a Maximum point at (-2,5)
Step-by-step explanation:
Help me pleaseee!,jejejejejejeke
Keisha, John, and Chris have a total of $99 in their wallets. Keisha has %7 less than John. Chris has 2 times what Keisha has. How much do they have in their wallets?
Answer:
99 yeah yeah
Step-by-step explanation:
okayyyyyyy
What is the midpoint of the line segment graphed below?
(5,9)
(2,-1) 10
-
A.
B. (7.10)
C. (7.8)
Answer:
Step-by-step explanation:
Use the midpoint calculator to find out the midpoint of a line segment, ... A graph showing how to find the midpoint of a segment on the Cartesian plane ... As a supplement to this calculator, we have written an article below that ... Divide 10 by 2, the result of which is 5, this is the y coordinate of the midpoint.
plz help asap thank you
Answer:3( 4x+2z+1)/3
Simplified
4x+2z+1 try to graph at desmos com
Step-by-step explanation:
Step-by-step explanation:
3(4x+3z+1)/3
=4x+3z+1
What is the greatest common factor of the polynomial's terms?
18a6+36a3
(A) 54a9
(B) 18a3
(C) 6a3
(D) 9a3
Answer-
B) 18a3 is the highest common factor