A. Find the critical value Z a/2 B. Find the critical value t a/2 C. State that

Question

A. Find the critical value Z a/2 B. Find the critical value t a/2 C. State that neither the normal nor the t distribution applies.
Confidence level 99% n=20 standard deviation is unknown, population appears to be normally distributed Quiz: Week 4 Quiz This Question: 5 pts Do one of the following, as appropriate. (a) Find the critical Confidence level 99%; n=20; is unknown, population app Click here to view a table of critical t-values Click Clic here to view page 1 of the standard normal table k here to view page 2 of the standard normal table Find the critical value A· Y/2-2861 O B. za/2 2.33 OC. za/2 2575 OD. /2-2.539 O E. Neither normal nor t distribution applies.

Explanation / Answer

Here, n=20

And standard deviation is Unknown

When sample size <30 we use t distribution

Thus we go with t distribution

Correct option is,

B) find thé critical value t (aplha) /2

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