Exam 1

1. Metainformation

   Tag	Value
   file	Probability_uva-random-variables-448-en_uva-random-variables-448-en
   name	uva-random-variables-448-en
   section	Probability/Elementary Probability/Random variables
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	Conceptual, Calculation
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	2.361
   p-value	0.4858

   Question

   Of 100 individuals, systolic blood pressure (SB) was measured and classified into three classes: 1 = low, 2 = medium and 3 = high. Also, the physical activity behavior (AG) was measured and classified into three classes classified: 1 = rarely, 2 = sometimes, 3 = regularly. The results are shown in cross tabulation below:

   ————- ——– ——– ——– frequencies SB = 1 SB = 2 SB = 3 AG = 1 4 12 14 AG = 2 13 25 12 AG = 3 8 8 4 ————- ——– ——– ——–

   For these 100 people, what is P(SB ≤ 2 ∪ AG = 3)?

   
   
   1. FALSE: 0.16
   2. TRUE: 0.74
   3. FALSE: 0.8
   4. FALSE: 0.9
   
   
   1. 0.16: Incorrect
   2. 0.74: Correct
   3. 0.8: Incorrect
   4. 0.9: Incorrect