Question

in a study of 82 video game players, the researchers found that the ages of these players were normally distributed, with a mean age of 17 years and a standard deviation of 3 years. determine if their were 15 video game players in this study over the age of 20. justify your answer

Answer 1

congrats on your first question

Answer 2

Z = ( 20 - 17 ) / 3 = 1
P ( Z > 1 ) = .1587
=> .1587 * 82 = 13 gamers
Thus there are 13 gamers over the age of 20.