Assign 9 4 PLEASE SHOW ALL WORK You have an SRS of 23 observ

Assign 9 #4 PLEASE SHOW ALL WORK

You have an SRS of 23 observations from a Normally distributed population. What critical value would you use to obtain a 98% confidence interval for the mean ? of the population? 2.500 2.508 2.326 eBook

Solution

As

df = n - 1 = 23 - 1 = 22

And, using a table, for 98% confidence (alpha/2 = 0.01),

tcrit = 2.508324553 = 2.508 [ANSWER, OPTION B]