A sample of 30-year fixed mortgage rates at 12 randomly chosen credit unions yie

Question

A sample of 30-year fixed mortgage rates at 12 randomly chosen credit unions yields a mean rate of 6.65% and a sample standard deviation of 0.39%. A sample of 30-year fixed mortgage rates at 16 randomly selected banks yields a mean rate of 7.05% and a sample standard deviation of 0.22%. Are the mean rates different between credit unions and banks? Relevant output is shown in the accompanying table. Which of the following is true? I. This is a paired design. II. This is a test of two means from independent samples III. This is a one tailed rest A. I only B. Both II and III C. II only D. III only

Explanation / Answer

c) only c option is correct

because Here given two sample

n1=12

n2=16

These are independent sample.

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