Quantitative methods

1. A sample of 300 withdrawal from a particular Teller are summarized in
fowllowing table

Amount $ no.of withdrawals
0-100 40
100-200 55
200-300 85
300-400 70
400-500 50

(a) calculate the mean , median and mode
(b) calculate standard deviation
(c) calculate quartiles deviation

唔識計....