Question

​Recently, a random sample of 13–18 year olds was​ asked, "How much do you currently have in​ savings?" The data in the table represent the responses to the survey. Approximate the mean and standard deviation amount of savings.

Savings		Frequency
​$0-199		336
​$200-399	​	99
​$400-599	​	57
​$600-799		19
​$800-999	​	14
​$1000-1199		7
​$1200-1399	​	3

Answer 1

from above:

sample mean =241.1822

and standard deviation =234.8818