The weight of bags of rice sold by a food retailer were classified as follows: Weight (kg) 0 to under 1.5 1.5 to under 3

[answerhappygod]

The weight of bags of rice sold by a food retailer were
classified as follows:
Weight (kg)
0 to under 1.5
1.5 to under 3.0
3.0 to under 4.5
4.5 to under 6.0
6.0 to under 7.5
7.5 to under 9.0
9.0 under 10.5
10.5 to under 12.0
Number of bags
10
25
30
48
35
22
20
10
a) What percentage of the bags weigh less than 4.5 kg?
b) If a bag is randomly selected from this shop what id the
probability that it weighs
9.0kg and 12.0kg?
c) Estimate the following statistics for the weights of the bags
in this shop:
i) Modal weight
ii) Median weight
iii) Mean weight
iv) Variance
v) Standard deviation
vi) Coefficient of skewness and explain your result.