Question

Imagine you and your 10 study group partners are interested in whether all those hours you spent together working on statistics problems for midterm exam 2 actually
helped your group’s performance on that exam relative to its performance on the first midterm exam. Suppose the first and second midterm grades were as follows:

Midterm 1 Midterm 2
Homer 25    28
Marg    20    19
Bart    15    21
Lisa    16    25

Maggie 30    30

Apu    20    22
Eddie 19    19
Krusty    5 0
Itchy 29    30
Scratchy 29    28
You 24 30

Is there sufficient evidence (at α = .05) to conclude that the group performed better
on midterm 2? Please provide all your calculations

Answer 1

From the above information,

We perform paired t test

Null hypothesis:-

difference between the average of the After midterm Before and μ0 is not big enough to be statistically significant.

By using minitab statistical software

Decision:-

P-value=0.920 > level of significance (0.05)

Accept null hypothesis.

Conclusion:-

Hence there is no sufficient evidence to conclude that the group performed better on midterm 2.

Thanks dear,

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