(a) Suppose that you would like to know if there is evidence that the mean time spent checking work email for white-collar workers in the United States is more than half of the 8-hour work day. What would you need to assume about the sample in order to use the given sample data to answer this question? (Select all that apply.) We would need to assume that the sample was randomly selected or is representative of the population of white-collar workers in the United States. V We would need to assume that all observations are dependent or all observations are independent. O We would need to assume that the distribution of the population of times is normal or that the sample size is large. O we would need to assume that the distribution of the population of times is normal or that the sample size is small. V We would need to assume that all white-collar workers were surveyed or the sample is representative of the population of white-collar workers in the United States. test to decide if there is evidence that the mean time spent checking work email for white-collar workers in (b) Given that any concerns about the sample were satisfactorily addressed, carry out the United States is more than half of the 8-hour work day. Suppose that the sample standard deviation was s = 1.4 hours. Use 0.05 significance level. State the appropriate null and alternative hypotheses. O Ho: H< 4 H:u > 4 O Ho: H = 4 Hạiu > 4 O Ho: H> 4 Hoiu < 4 O Ho: H = 4 H: u < 4 O Hoi H = 4 Find the test statistic and P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.) t = P-value =

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
Question
100%
USA TODAY (October 14, 2016) reported that Americans spend 4.1 hours per weekday checking work email. This was an estimate based on a survey of 1,004 white-collar workers in the United States.
(a) Suppose that you would like to know if there is evidence that the mean time spent checking work email for white-collar workers in the United States is more than half of the 8-hour work day.
What would you need to assume about the sample in order to use the given sample data to answer this question? (Select all that apply.)
We would need to assume that the sample was randomly selected or is representative of the population of white-collar workers in the United States.
We would need to assume that all observations are dependent or all observations are independent.
We would need to assume that the distribution of the population of times is normal or that the sample size is large.
We would need to assume that the distribution of the population of times is normal or that the sample size is small.
We would need to assume that all white-collar workers were surveyed or the sample is representative of the population of white-collar workers in the United States.
(b) Given that any concerns about the sample were satisfactorily addressed, carry out a test to decide if there is evidence that the mean time spent checking work email for white-collar workers in
the United States is more than half of the 8-hour work day. Suppose that the sample standard deviation was s = 1.4 hours. Use a 0.05 significance level.
State the appropriate null and alternative hypotheses.
Ho: u < 4
Hạ: u > 4
Ho: H = 4
Hgi H> 4
Ho: H > 4
H: u < 4
a'
O Ho: H = 4
%3D
H: µ < 4
4
H: u + 4
a
Find the test statistic and P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.)
t =
P-value
%D
Transcribed Image Text:(a) Suppose that you would like to know if there is evidence that the mean time spent checking work email for white-collar workers in the United States is more than half of the 8-hour work day. What would you need to assume about the sample in order to use the given sample data to answer this question? (Select all that apply.) We would need to assume that the sample was randomly selected or is representative of the population of white-collar workers in the United States. We would need to assume that all observations are dependent or all observations are independent. We would need to assume that the distribution of the population of times is normal or that the sample size is large. We would need to assume that the distribution of the population of times is normal or that the sample size is small. We would need to assume that all white-collar workers were surveyed or the sample is representative of the population of white-collar workers in the United States. (b) Given that any concerns about the sample were satisfactorily addressed, carry out a test to decide if there is evidence that the mean time spent checking work email for white-collar workers in the United States is more than half of the 8-hour work day. Suppose that the sample standard deviation was s = 1.4 hours. Use a 0.05 significance level. State the appropriate null and alternative hypotheses. Ho: u < 4 Hạ: u > 4 Ho: H = 4 Hgi H> 4 Ho: H > 4 H: u < 4 a' O Ho: H = 4 %3D H: µ < 4 4 H: u + 4 a Find the test statistic and P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.) t = P-value %D
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps with 1 images

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
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