Exam 1

1. Metainformation

   Tag	Value
   file	Descriptive-statistics_uva-standard-deviation-598-en_uva-standard-deviation-598-en
   name	uva-standard-deviation-598-en
   section	Descriptive statistics/Summary Statistics/Measures of Spread/Standard Deviation
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Calculation
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	4.121
   p-value	0.0964

   Question

   Of two independent stochastic variables X and Y, the population standard deviations are 4 and 3, respectively. What then is the population standard deviation of X-Y ?

   
   
   1. FALSE: 7
   2. FALSE: 25
   3. FALSE: 1
   4. TRUE: 5
   
   
   1. 7: Incorrect
   2. 25: Incorrect
   3. 1: Incorrect
   4. 5: Correct