Exam 1

1. Metainformation

   Tag	Value
   file	Descriptive-statistics_uva-correlation-828-en_uva-correlation-828-en
   name	uva-correlation-828-en
   section	Descriptive statistics/Summary Statistics/Bivariate statistics/Correlation
   type	schoice
   solution	FALSE, TRUE, FALSE
   Type	Conceptual, Calculation
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	4.107
   p-value	0.097

   Question

   The regression formula to predict a person’s height (y) from her/his weight (x) is $\hat{y}=100+1.5x$ When in a group the standard deviation of height is twice as large as that of weight in that group , the correlation between height and weight is equal to

   
   
   1. FALSE: 0.25
   2. TRUE: 0.75
   3. FALSE: 1
   
   
   1. 0.25: Incorrect
   2. 0.75: Correct
   3. 1: Incorrect