Exam 1

1. Metainformation

   Tag	Value
   file	Descriptive-statistics_uva-correlation-826-en_uva-correlation-826-en
   name	uva-correlation-826-en
   section	Descriptive statistics/Summary Statistics/Bivariate statistics/Correlation
   type	schoice
   solution	TRUE, FALSE, FALSE
   Type	Conceptual, Calculation
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	3.788
   p-value	0.1573

   Question

   The regression formula to predict a person’s height (y) from her/his weight (x) is $\hat{y}=100+0.5x$ When in a group the standard deviation of weight is twice as small as that of height in that group , the correlation between height and weight is equal to

   
   
   1. TRUE: 0.25
   2. FALSE: 0.33
   3. FALSE: 0.50
   
   
   1. 0.25: Correct
   2. 0.33: Incorrect
   3. 0.50: Incorrect