Another one-sample t test. The one-sample t statistic for testing H0: 5 60 Ha: 60 from a sample of n 5 25

Another one-sample t test. The one-sample t statistic for testing H0:  5 60 Ha:  Þ 60 from a sample of n 5 25 observations has the value t 5 21.79.

(a) What are the degrees of freedom for t?

(b) Locate the two critical values t* from Table D that bracket t. What are the right-tail probabilities p for these two values?

(c) How would you report the P-value for this test?

(d) Is the value t 5 21.79 statistically significant at the 5% level? At the 1% level?

(e) If you have software available, find the exact P-value.