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A sample of 30-year fixed mortgage rates at 36 randomly chosen credit unions yields a mean...

A sample of 30-year fixed mortgage rates at 36 randomly chosen credit unions yields a mean rate of 5.34% and a sample standard deviation of 0.64%. A sample of 30-year fixed mortgage rates at 25 randomly selected banks yields a mean rate of 5.16% and a sample standard deviation of 0.52%. In order to test the mean rates different between credit unions and banks, we would like to find the t test statistic first. What is the t test statistic? (Round to 3 decimal places.)

math   Statistics-And-Probability   
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