A researcher has developed a regression model from fourteen pairs of data points. He wants to test if the slope is significantly different from zero. He uses a two? tailed test and ɑ = 0.01. The critical table t value is ___.
A) 2.650
B) 3.012
C) 3.055
D) 2.718
E) 2.168

Question

Quizplus · Accepted Answer

Since the researcher is conducting a two-tailed test with a 0.01 level of significance, the critical t value can be found using a t-distribution table with 12 degrees of freedom (n-2). Looking up 0.005 in the table (since it is a two-tailed test), we get a critical t value of 3.055. Therefore, choice C is the correct answer.

A Researcher Has Developed a Regression Model from Fourteen Pairs