Exam 1

1. Metainformation

   Tag	Value
   file	Descriptive-statistics_uva-correlation-827-en_uva-correlation-827-en
   name	uva-correlation-827-en
   section	Descriptive statistics/Summary Statistics/Bivariate statistics/Correlation
   type	schoice
   solution	FALSE, FALSE, TRUE
   Type	Conceptual, Calculation
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	4.043
   p-value	0.1052

   Question

   The regression formula to predict a person’s height (y) from her/his weight (x) is $\hat{y}=100+2x$ When in a group the standard deviation of height is twice as small as that of weight in that group , the correlation between height and weight is equal to

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