Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_vufsw-t-statistic-1265-en_vufsw-t-statistic-1265-en
   name	vufsw-t-statistic-1265-en
   section	inferential statistics/nhst/test statistic/t-statistic
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	interpreting output
   Program	NA
   Language	English
   Level	statistical literacy

   Question

   Of 190 randomly selected secretaries it was recorded how fast they type (X, in words per minute) and how fast they read (Y, in words per minute). The regression results are below. What conclusion can we draw based on the results?

   The regression formula is Y= 290.21 + 3.50x
   R-squared = 0.12
   190 - 2 = 188 degrees of freedom

   	Regression coefficient	SE	t
   Constant	290.21	215.41	1.35
   fastness typing	3.50	3.52	0.99

   Below are two statements about these results. Which statement(s) is / are correct?

   I. Based on this sample, the typing speed of a secretary has no significant influence on how quickly she can read (at a significance level of .05).
   II. A secretary types on average with a speed of 3.50 words per minute.

   
   
   1. TRUE: Statement I is correct.
   2. FALSE: Statement II is correct.
   3. FALSE: Both statements are correct.
   4. FALSE: None of the statements is correct.
   
   

   Solution

   The t value is below the critical value, thus not significant, thus I is true. And we do not have the information on the average speed, thus II is false. .

   M&T Bivariate linear regression
   Bivariate linear regression

   M&T Multivariate linear regression
   Default value

   
   
   1. True
   2. False
   3. False
   4. False