In order to predict with 98% confidence the expected value of y for a given value of x in a simple linear regression problem,a random sample of 15 observations is taken.Which of the following t-table values listed below would be used?
A)1.350
B)1.771
C)2.160
D)2.650

Question

Quizplus · Accepted Answer

To predict with 98% confidence, we need to find the t-value for a two-tailed test with 13 degrees of freedom (since n - 2 = 15 - 2 = 13). Looking at a t-table, we find that the closest value to the t-value for this confidence level is 2.650, which corresponds to choice D.

In Order to Predict with 98% Confidence the Expected Value