SOLUTION: Seth asked a random sample of 20 students how much cash they had in their pocket. The following frequency table gives the responses. cash ($) /freq 0 / 1 1 /

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Question 1173581: Seth asked a random sample of 20 students how much cash they had in their pocket. The following frequency table gives the responses.

cash ($) /freq
0 / 1
1 / 4
5 / 5
20 / 8
44 / 1
985 / 1

Find the standard deviation. Give your answer to at least 2 decimal places
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
the mean is $60.90
The sd is $217.80
The sum is $1218
the sd is the sqrt of csum of the squared deviations from the mean divided by 19 (sample)
60.9^2+59.9^2*4+55.9^2*5+40.9^2*8+16.9^2+924.1^2=901313.80 $^2,
divide by 19 and take the square root.