What percentage of times are between 6 and 22 hour

Question

The graph shows the distribution of times (in hours) that teenagers spend playing video games per week. The distribution is approximately Normal, with a mean of 14 hours and a standard deviation of 4 hours.

Answer 1

Hi, since this distribution is approximately Normal we can apply the empirical rule which states that 95% of all data is within 2 standard deviations of the mean. Since 6 and 22 hours are both 2 standard deviations from the mean of 14 hours, then 95% of times lie within that range. Hope that helps