Exam 1

1. Metainformation

   Tag	Value
   file	Probability_uva-rules-for-expected-values-614-en_uva-rules-for-expected-values-614-en
   name	uva-rules-for-expected-values-614-en
   section	Probability/Elementary Probability/Random variables/Rules for expected values
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	Calculation
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	2
   p-value	0.5905

   Question

   Of 200 individuals, gender and original hair color were determined. The results are shown in the following cross tabulation:

   ——- ——- ——- ——- —— —– black brown blond red woman 30 26 54 10 120 male 10 24 36 10 80 40 50 90 20 200 ——- ——- ——- ——- —— —–

   One person is randomly drawn from these 200 individuals.Ê We define the following two events A: the person’s original hair color is black. B: the person is of the female gender.P(A ∪ B) =

   
   
   1. FALSE: 0.15
   2. TRUE: 0.65
   3. FALSE: 0.8
   4. FALSE: 0.25
   
   
   1. 0.15: Incorrect
   2. 0.65: Correct
   3. 0.8: Incorrect
   4. 0.25: Incorrect