Lifetime (in years) number of product
10-15 5
15-20 15
20-25 20
25-30 6
30-35 4
A) calculate the mean,median and mode and compare them.
B) calculate their geometric and harmonic means.
C) calculate the upper quartile, the 4th decile and the 64th percentile
D) estimate the number of product whose life is (a)below 22 (b) above
E) determine type of skewness