Question: A two sample Z test for the difference in population means is to be performed with H 0 : A = B vs. H a

A two sample Z test for the difference in population means is to be performed with

H0: A = B vs. H a: A B.

The test is to be performed at a 95% level of confidence. Data for the samples is shown in the table below.

Sample

Size (n)

Mean

Std dev.

A

66

32

4.6

B

80

30

4.1

What is the Ztest value to be used in the analysis?

Group of answer choices

+2.745

+1.96

+1.645

+3.66

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