The following frequency distribution shows the price per share for a sample of 30 companies listed on the New York Stock Exchange. Assume there are no price per shares between 29 and 30, 39 and 40, etc.
Price per Share Frequency
$20-29 9
$30-39 5
$40-49 6
$50-59 5
$60-69 2
$70-79 2
$80-89 1
1. Compute the sample mean price per share for the Dow Jones Industrial Average companies (to 2 decimals).
2. Compute the sample standard deviation of the price per share for the Dow Jones Industrial Average companies (to 2 decimals).