## Question 912:

1## Answer:

No answer provided yet.We will use the t-distribution here to find the critical value. We can use a t-table or look up the value using Excel or using the online calculator here:We use the excel function =TINV(.05, 19) which are the alpha value and the degrees of freedom 19 (20-1).

We get a critical statistic of 2.09.

This means we'd reject the Null hypothesis if the test statistic fell above 2.09.