According to a recent government survey, the daily one-way commuting distance of U. S. workers averages 13 miles.

According to a recent government survey, the daily one-way commuting distance
of U. S. workers averages 13 miles. An investigator wishes to determine whether the
national average describes the mean commute distance for all workers in the Chicago area.
Commute distances are obtained for a random sample of 100 workers from this area, and the
mean distance is found to be 12.25 miles with a standard deviation of 2.5 miles. Test the null
hypothesis at the .05 level of significance.

A. State H 0 : ______________________
B. State H A : ______________________
C. Is this a one- or two-tail test? Why? ______________________________________
D. What is(are) the critical value(s)? ______________________
E. What is the decision rule? _______________________________________________
F. Calculate the t statistic:

t = x̄- µm/ s/√n

G. What is your decision regarding H 0 and why? _______________________________
H. Interpretation of the results: _____________________________________________

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

According to a recent government survey, the daily one-way commuting distance of U.S. workers averages 13...

According to a recent government survey, the daily one-way commuting distance of U.S. workers averages 13 miles with a standard deviation of 13 miles. An investigator wishes to determine whether the national average describes the mean commute distance for all workers in the Chicago area. Commute distances are obtained for a random sample of 168 workers from this area, and the mean distance is found to be 10.5 miles. Test the null hypothesis at the.05 level of significance. a. state...

13.) According to a recent report, 46% of college student internships are unpaid. A recent survey...

13.) According to a recent report, 46% of college student internships are unpaid. A recent survey of 120 college interns at a local university found that 60 had unpaid internships. - Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to determine whether the proportion of college interns that had unpaid internships is different from 0.46. Assume that the study found that 69 of the 120 college interns had unpaid internships and repeat (a). Are...

A survey was given to 18 students. One question asked about the one-way distance the student...

A survey was given to 18 students. One question asked about the one-way distance the student had to travel to attend college. The results, in miles, are shown in the following table. Use the median procedure for finding quartiles to find the first, second, and third quartiles for the data. Distance Traveled to Attend College 46 50 18 26 64 78 4 38 44 44 10 70 74 44 86 32 26 48 Q1 = Q2 = Q3 =

Subjects

Question