If Peter would like to test whether mean sales for his treatment group differed between April and May, what two samples would he use?

Select one:

A and B

A and C

A and D

C and D

B and C

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If Peter would like to test whethermean sales for his treatment groupdiffered between April and May, what two samples would he use?

Select one:

Two-sample t-test assuming equal variance.

Two-sample t-test assuming Unequal Variance

Paired two-sample t-test.

A or B, but not C.

None of the above.