Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_vufsw-normal-1105-en_vufsw-normal-1105-en
   name	vufsw-normal-1105-en
   section	distributions/continuous/normal
   type	schoice
   solution	FALSE, FALSE, TRUE, FALSE
   Type	conceptual
   Program	NA
   Language	English
   Level	statistical literacy

   Question

   Students exercise, on average, for one hour and 40 min per week. However, the standard deviation of the time they spend in sports is large, 20 minutes. These figures are calculated from a large-enough sample and the relevant variable is normally distributed. According to the Empirical Rule [–1–] of the observations lie between [–2–] minutes per week and [–3–] between [–4–] minutes per week.

   
   
   1. FALSE: [–1–] 68% [–2–] 9 and 33 [–3–] 95% [–4–] 80 and 120
   2. FALSE: [–1–] 90% [–2–] 80 and 120 [–3–] 95% [–4–] 60 and 140
   3. TRUE: [–1–] 68% [–2–] 80 and 120 [–3–] 95% [–4–] 60 and 140
   4. FALSE: [–1–] 50% [–2–] 80 and 120 [–3–] 68% [–4–] 70 and 130
   
   
   1. False
   2. False
   3. True
   4. False