Exam 1

1. Metainformation

   Tag	Value
   file	Descriptive-statistics_eur-descriptive-111-en_eur-descriptive-111-en
   name	eur-descriptive-111-en
   section	Descriptive statistics/Summary Statistics/Measures of Spread/Standard Deviation
   type	num
   solution	0.5
   tolerance	0
   Type	Calculation
   Program	Calculater
   Language	English
   Level	Statistical Literacy

   Question

   On the exam of course 2.8, 189 students gave a correct response to the question “What is the population mean of drawing a head of a coin?” 71 students gave an incorrect answer.

   What is the standard deviation of the mean score of a head?

   
   

   Solution

   The standard deviation of drawing a head is $\sqrt{.5 \times .5} = .5$ (taking the square root of the variance).