Question

A national computer retailer believes that the average sales are greater for salespersons with a college degree. A random sample of 14 salespersons with a degree had an average weekly sale of $3542 last year, while 17 salespersons without a college degree averaged $3301 in weekly sales. The standard deviations were $468 and $642 respectively. Is there evidence to support the retailer’s belief?

a. This is a:

z-test for one proportion

t-test for the mean

t-test for matched pairs

z-test for the mean

t-test for the difference in 2 means

b. This is a:

one-tailed test

two-tailed test

c. The sample statistic is:

241

3542

3301

−174

d. The test statistic is:

1.207

199.724

28.563

0.0015

e. The p-value is

0.124

0.122

0.878

0.876

Answer 1

a.

t test for difference between 2 means

b.

One tailed test.

c.

241

d.

1.207

e.

Nearest value to p value is,

0.124

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