Exam 1

1. Metainformation

   Tag	Value
   file	Probability_vufsw-conditional_probability-1234-en_vufsw-conditional_probability-1234-en
   name	vufsw-conditional probability-1234-en
   section	probability/elementary probability/conditional probability
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	calculation
   Program	calculator
   Language	English
   Level	statistical literacy

   Question

   In a debate competition at a secondary school, half of the participants were asked to wear a suit, while the other half were asked to wear a t-shirt. The table below shows how much has been won and lost.

   	won	lost
   Suit	22	28
   T-shirt	28	22

   What is the relative risk of losing, in which the participants wearing a suit are compared with the participants wearing a t-shirt?
   And what is the correct interpretation of this number?

   
   
   1. TRUE: 1.27; those who wore a suit had a 1.27 times greater chance of losing than those wearing a t-shirt.
   2. FALSE: 1.27; those who wore a t-shirt had a 1.27 times greater chance of losing than those who wore a suit.
   3. FALSE: 0.79; those who wore a suit had a 0.79 times greater chance of losing than those wearing a t-shirt.
   4. FALSE: 0.12; those who wore a t-shirt had a 0.12 times greater chance of losing than those who wore a suit.
   
   

   Solution

   Chance of losing with suit =0.56 (28/50); chance of losing with t-shirt =0.44 (22/50). 0.56/0.44=1.27, thus 1.27; those who wore a suit had a 1.27 times greater chance of losing than those wearing a t-shirt.

   
   
   1. True
   2. False
   3. False
   4. False