Experts plzz answer ques 47 na the Standard deviattons
Coefficient of = 53%}
Average Daily Pocket
are given below:
34.5
28.5
Standard Deviation
5.0
No. of Teenagers
476-
4.5
Which town, A or B, pays out the larger amount Of daily pocket money?
524
What iS the average daily pocket money of all teenagers taken together?
calculate coefficient of variation of each town.Which town is more vanable in terms of pocket money?
j, Town A = 16.422: Town B = A pays
Combined Pocket Money = C V CU 79%.
Town 8 fs more variable kn terms Of pocket money as its C V is higher}
The prices of share of Company X and CompanyY are given below. State, which company is more
stable?
company X
Company Y
25
5045 30 70
4236 48 34 60
70 50
10
95
55 42 60 48 GO
{C. V of Prices of Share of X co. C. V of Prices Share co.
Prices of Share of X Co. is more stabie}
47. A student obtained the mean and standard deviation of 100 observations as 40 and 5.1 respectively.
It was later found that one observation was wrongly copied as 50 instead of 40. Find the correct mean
and standard deviation.
{Correct Mean 39.9; Standard deviation 5}
48. From the following data, calculate standard deviation of the two groups A and B. Which group is more
consistent?
Class-Interval
5—10
10-15
15-20
20-25
25-30
Group A
2
9
29
54
11
Group B
9
11
18
32
27
13
{CA 4.88; 7.07; Group A is more consistent as C.V. of Group A (23.18%) less than
30-35
Miculate standard deviation. What will be the value of sta
