The most common number of cars per family is two. At a 95% confidence level, find the confidence interval for the population proportion associated with two cars. (Round your answers to three decimal places.) a (b) Which of the following correctly describes the confidence interval for the population proportion? O If the same sampling method was used, and each had an associated interval, 95% of these intervals would contain the true population proportion. O We are 5% confident that between 34.6% and 59.1% of families own exactly 2 cars. At least 34.6% of families have two cars. Between 34.6% and 59.1% of families have at least two cars. O There is a 95% chance the proportion of families with 2 cars is less than 59.1%.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
imp
?
Distributions
Cars
Frequencies
Confidence Intervals
Prob Lower CI Upper CI 1-Alpha
7 0.11667 0.057677 0.221788
28 0.46667 0.346279 0.
Level
Count
Prob
Level
Count
7 0.11667
28 0.46667
1
1
0.950
2
1066
0.950
17 0.28333
17 0.28333 0.185068 0.407673
0.950
8 0.13333 0.069141 0.241652
8 0.13333
60 1.00000
4
0.950
Total
Total
60
N Missing
Note: Computed using score confidence intervals.
4 Levels
Click here to access the JMP applet in a new window.
O (a)
The most common number of cars per family is two. At a 95% confidence level, find the confidence interval for the population proportion
associated with two cars. (Round your answers to three decimal places.)
O (b)
Which of the following correctly describes the confidence interval for the population proportion?
O If the same sampling method was used, and each had an associated interval, 95% of these intervals would contain the true population
proportion.
O We are 5% confident that between 34.6% and 59.1% of families own exactly 2 cars.
O At least 34.6% of families have two cars.
O Between 34.6% and 59.1% of families have at least two cars.
O There is a 95% chance the proportion of families with 2 cars is less than 59.1%.
L-2 34
Transcribed Image Text:imp ? Distributions Cars Frequencies Confidence Intervals Prob Lower CI Upper CI 1-Alpha 7 0.11667 0.057677 0.221788 28 0.46667 0.346279 0. Level Count Prob Level Count 7 0.11667 28 0.46667 1 1 0.950 2 1066 0.950 17 0.28333 17 0.28333 0.185068 0.407673 0.950 8 0.13333 0.069141 0.241652 8 0.13333 60 1.00000 4 0.950 Total Total 60 N Missing Note: Computed using score confidence intervals. 4 Levels Click here to access the JMP applet in a new window. O (a) The most common number of cars per family is two. At a 95% confidence level, find the confidence interval for the population proportion associated with two cars. (Round your answers to three decimal places.) O (b) Which of the following correctly describes the confidence interval for the population proportion? O If the same sampling method was used, and each had an associated interval, 95% of these intervals would contain the true population proportion. O We are 5% confident that between 34.6% and 59.1% of families own exactly 2 cars. O At least 34.6% of families have two cars. O Between 34.6% and 59.1% of families have at least two cars. O There is a 95% chance the proportion of families with 2 cars is less than 59.1%. L-2 34
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