Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_vufsw-t-statistic-1127-en_vufsw-t-statistic-1127-en
   name	vufsw-t-statistic-1127-en
   section	inferential statistics/nhst/test statistic/t-statistic
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE, FALSE
   Type	performing analysis
   Program	calculator
   Language	English
   Level	statistical thinking

   Question

   A random sample of 15 Communication science students (group 1) and of 15 Political Science students (group 2) were selected and asked to report on a scale from 0 to 100, how they evaluate a certain television series. Results are reported in the table below.

   	N	mean	standard deviation	standard error
   group 1	15	59.31	17.83	4.95
   group 2	15	70.77	17.36	3.43

   The hypothesis of the researcher is that Communication science students will evaluate the television series different from Political science students. Find the t-value for the researcher’s hypothesis.

   
   
   1. FALSE: -0,07
   2. TRUE: -1,78
   3. FALSE: -1,96
   4. FALSE: -2,68
   5. FALSE: -3,11
   
   

   Solution

   The null hypothesis states: The alternative hypothesis states:

   SE = √ [ (s₁²/n₁) + (s₂²/n₂) ] = √ [(17,83²/15) + (17,36²/15) ] = 6,43

   sample sizes are equal.

   t = ( 59,31 - 70,77 ) / 6,43= -1,78

   If you want to know more about comparing two groups and the t-test watch this clip

   Language
   Nederlands

   Levels of Difficulty
   Medium

   M&T BIS
   Default value

   M&T Hypothesis testing: means
   Default value

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