7.10 Topic 10: Inference for One Proportion 78. Choose the correct word (s) to fill in the blank for each sentence. (a) A point estimate is obtained from the (sample/population) (b) A point estimate is used to make inferences about the (sample statistic/population parameter) (C) As the sample size decreases, the width of the confidence interval (increases/decreases/does not change) (a) As the level of confidence increases, the width of the confidence interval (increases/decreases/does not change) (e) As the point estimate increases, the width of the confidence interval (increases/decreases/does not change) (sample/population) (f) Interpretations of a cofidence interval are always in terms of the 79. What is the multiplier for an interval that estimates the proportion with (a) 88% confidence? (b) 98% confidence? 80. Research commissioned by AT&T and conducted by Braun Research in 2015 polled 2,00 in the U.S. aged 16-65 who use their smartphone and drive at least once a day. An unsettling 17% of the respondents admitted to taking pictures/selfies while driving. (a) What is the point estimate for the proportion of drivers who take pictures with a smartphone while driving? (b) What is the multiplier for a 90% confidence interval to estimate the proportion of drivers who take photos? (c) What is the standard error for the proportion who take photos? (d) What is the margin of error? (e) Construct a confidence interval for proportion of all drivers who take pictures while driving. (f) Interpret the interval. (g) A friend claims that 25% of drivers take pictures while behind the wheel? Is your friend's claim valid? Explain. 81. Research commissioned by AT&T and conducted by Braun Research in 2015 polled 2,067 people in the U.S. aged 16-65 who use their smartphone and drive at least once a day. When asked if they used Facebook while driving, 558 respondents answered "yes". (a) What is the point estimate for the proportion of drivers who access Facebook while driving? (b) What is the margin of error for a 95% confidence interval? (c) Construct a confidence interval for proportion of all drivers who take pictures while driving. (d) Interpret the interval. (e) An independent researcher claims that 30% of drivers use Facebook behind the wheel. Based on the interval, is the claim valid? Explain.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
icon
Concept explainers
Topic Video
Question

Question 79

7.10
Topic 10: Inference for One Proportion
78. Choose the correct word (s) to fill in the blank for each sentence.
(a) A point estimate is obtained from the
(sample/population)
(b) A point estimate is used to make inferences about the
(sample statistic/population parameter)
(C) As the sample size decreases, the width of the confidence interval
(increases/decreases/does not change)
(a) As the level of confidence increases, the width of the confidence interval
(increases/decreases/does not change)
(e) As the point estimate increases, the width of the confidence interval
(increases/decreases/does not change)
(sample/population)
(f) Interpretations of a cofidence interval are always in terms of the
79. What is the multiplier for an interval that estimates the proportion with
(a) 88% confidence?
(b) 98% confidence?
80. Research commissioned by AT&T and conducted by Braun Research in 2015 polled 2,00
in the U.S. aged 16-65 who use their smartphone and drive at least once a day. An unsettling
17% of the respondents admitted to taking pictures/selfies while driving.
(a) What is the point estimate for the proportion of drivers who take pictures with a smartphone
while driving?
(b) What is the multiplier for a 90% confidence interval to estimate the proportion of drivers
who take photos?
(c) What is the standard error for the proportion who take photos?
(d) What is the margin of error?
(e) Construct a confidence interval for proportion of all drivers who take pictures while driving.
(f) Interpret the interval.
(g) A friend claims that 25% of drivers take pictures while behind the wheel? Is your friend's
claim valid? Explain.
81. Research commissioned by AT&T and conducted by Braun Research in 2015 polled 2,067 people
in the U.S. aged 16-65 who use their smartphone and drive at least once a day. When asked if
they used Facebook while driving, 558 respondents answered "yes".
(a) What is the point estimate for the proportion of drivers who access Facebook while driving?
(b) What is the margin of error for a 95% confidence interval?
(c) Construct a confidence interval for proportion of all drivers who take pictures while driving.
(d) Interpret the interval.
(e) An independent researcher claims that 30% of drivers use Facebook behind the wheel. Based
on the interval, is the claim valid? Explain.
Transcribed Image Text:7.10 Topic 10: Inference for One Proportion 78. Choose the correct word (s) to fill in the blank for each sentence. (a) A point estimate is obtained from the (sample/population) (b) A point estimate is used to make inferences about the (sample statistic/population parameter) (C) As the sample size decreases, the width of the confidence interval (increases/decreases/does not change) (a) As the level of confidence increases, the width of the confidence interval (increases/decreases/does not change) (e) As the point estimate increases, the width of the confidence interval (increases/decreases/does not change) (sample/population) (f) Interpretations of a cofidence interval are always in terms of the 79. What is the multiplier for an interval that estimates the proportion with (a) 88% confidence? (b) 98% confidence? 80. Research commissioned by AT&T and conducted by Braun Research in 2015 polled 2,00 in the U.S. aged 16-65 who use their smartphone and drive at least once a day. An unsettling 17% of the respondents admitted to taking pictures/selfies while driving. (a) What is the point estimate for the proportion of drivers who take pictures with a smartphone while driving? (b) What is the multiplier for a 90% confidence interval to estimate the proportion of drivers who take photos? (c) What is the standard error for the proportion who take photos? (d) What is the margin of error? (e) Construct a confidence interval for proportion of all drivers who take pictures while driving. (f) Interpret the interval. (g) A friend claims that 25% of drivers take pictures while behind the wheel? Is your friend's claim valid? Explain. 81. Research commissioned by AT&T and conducted by Braun Research in 2015 polled 2,067 people in the U.S. aged 16-65 who use their smartphone and drive at least once a day. When asked if they used Facebook while driving, 558 respondents answered "yes". (a) What is the point estimate for the proportion of drivers who access Facebook while driving? (b) What is the margin of error for a 95% confidence interval? (c) Construct a confidence interval for proportion of all drivers who take pictures while driving. (d) Interpret the interval. (e) An independent researcher claims that 30% of drivers use Facebook behind the wheel. Based on the interval, is the claim valid? Explain.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 4 images

Blurred answer
Knowledge Booster
Sample space, Events, and Basic Rules of Probability
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman