Chapter 20.3, Problem 20.5AYK

a.

To determine

To find: The critical value $t*$ for a 95% confidence interval based on $n=12$ observations.

b.

To determine

To find: The critical value $t*$ for a 99% confidence interval based on $n=2$ observations.

c.

To determine

To find: The critical value $t*$ for a 90% confidence interval based on $n=1,001$ observations.