A final one-sample t test. The one-sample t statistic for testing H0: = 20 Ha: < 20 based on n = 150 observations has

A final one-sample t test. The one-sample t statistic for testing H0: μ = 20 Ha:μ < 20 based on n = 150 observations has the value t = −3.83.

(a) What are the degrees of freedom for this statistic?

(b) How would you report the P-value based on Table D?

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