Exam 1

1. Metainformation

   Tag	Value
   file	Descriptive-statistics_uva-correlation-175-en_uva-correlation-175-en
   name	uva-correlation-175-en
   section	Descriptive statistics/Summary Statistics/Bivariate statistics/Correlation
   type	schoice
   solution	FALSE, TRUE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	4.212
   p-value	0.082

   Question

   In an examination of the correlation between reaction times to a simple task (y) and IQ (x) found a correlation of r = 0.60. This can be interpreted as

   
   
   1. FALSE: A 60% decrease in errors of predicting y with x.
   2. TRUE: A 36% decrease in errors of predicting y with x.
   3. FALSE: That for 60% of all y, prediction (ŷ) = y.
   
   
   1. A 60% decrease in errors from predicting y with x.: Incorrect
   2. A 36% decrease in errors of predicting y with x.: Correct
   3. That for 60% of all y, prediction (ŷ) = y.: Incorrect