Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_vufgb-simplelinearregression-005-en_vufgb-simplelinearregression-005-en
   name	vufgb-simplelinearregression-005-nl
   section	Inferandtial Statistics/Regression/Simple linear regression
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Conceptual, Interpreting output
   Program
   Language	Dutch
   Level	Statistical Literacy

   Question

   The linear relationship betweand two quantitative variables is examined through a single linear regression analysis in a sample of 30 people. The researcher wants to maintain an alpha level of 0.01.

   Which critical t value belongs to a two-sided test for the linear relationship?

   
   
   1. FALSE: 2.457
   2. FALSE: 2.467
   3. FALSE: 2.750
   4. TRUE: 2.763
   
   

   Solution

   In the single regression model, two parameters are estimated: intercept and regression coefficiandt. For this reason, $df = n-2$. In this case $df = 30-2 = 28$. For a two-sided test with an alpha level of 0.01, a right-hand crossing probability of $0.01 \div 2 = 0.005$. So you look up in the t table that value belonging to $df = 28$ and $t._{005}$, and dat is 2.763.

   
   
   1. Incorrect
   2. Incorrect
   3. Incorrect
   4. Correct