Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Effect-size-809-en_uu-Effect-size-809-en
   name	uu-Effect-size-809-en.Rmd
   section	Inferential Statistics/Effect size
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	Case
   Language	English
   Level	Statistical Literacy

   Question

   Spatial perception is measured on a scale from 0 to 10. The scores on this test are normally distributed with a mean of 5 and a standard deviation of 1.5. A group of 9th grade students are tested for spatial perception. SPSS was used to obtain descriptive statistics of the spatial perception scores in the sample.

   

   Using α = 0.01, the mean score is significantly different from 5. What is the effect size that should be reported?

   
   
   1. FALSE: 2.83
   2. TRUE: 0.67
   3. FALSE: 3.33
   4. FALSE: 12
   
   

   Solution

   $d=\frac{6-5}{1.5}=0.67$