Independent random samples of 17 sophomores and 13 juniors attending a large university yield the following data on grade point averages: sophomores juniors x bar 2.84 2.75 n 17 13 s 0.52 0.31 Add the 5% significance level, does the data provide sufficient evidence to conclude that the mean GPAs of sophomores at the University are better than the juniors? 1. choose the correct parameter for the problem
Independent random samples of 17 sophomores and 13 juniors attending a large university yield the following data on grade point averages:
sophomores juniors
x bar 2.84 2.75
n 17 13
s 0.52 0.31
Add the 5% significance level, does the data provide sufficient evidence to conclude that the mean GPAs of sophomores at the University are better than the juniors?
1. choose the correct parameter for the problem
a. Mu1: the average GPAs of all sophomores attending a large university ; Mu2: the average GPAs of all juniors attending a large university
b. All sophomores attending a large university; all juniors attending a large university
c. The average GPA of all students attending a large university
d. xbar1: the average GPAs of all sophomores attending a large university; xbar2: the average GPA's of all juniors attending a large University
2. Select the correct hypotheses for the problem
a. HO: mu1= Mu2, HA mu1< mu2
b.HO: mu1 < Mu2, HA mu1 > mu2
c. HO: mu1 = Mu2, HA mu1 not equal to mu2
d. HO: mu1 = Mu2, HA mu1 > mu2
3. calculate the appropriate values (use four decimal places) show all your work on a separate sheet of paper
Sp= ? t=?
Select the correct decision and conclusion for the problem:
a. Do not reject HO, we have sufficient evidence to conclude that the mean GPAs of sophomores at the University are better than the juniors
b. Reject HO, we have sufficient evidence to conclude that the mean GPAs of sophomores at the university or better than the juniors
c. Reject HO, we do not have sufficient evidence to conclude that the mean GPAs of sophomores at the university are better than the junior
d. Do not reject HO, we do not have sufficient evidence to conclude that the mean GPAs of sophomores at the University are better than the juniors
Thank you!!!
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 2 images
