The Total solution for NCERT class 6-12
Calculate the meanand S.D. for the following data:
Expenditure (in ₹):
0-10
10-20
20-30
30-40
40-50
Frequency:
14
13
27
21
15
Answer - 1 : -
Calculate thestandard deviation for the following data:
Class:
0-30
30-60
60-90
90-120
120-150
150-180
180-210
9
17
43
82
81
44
24
Answer - 2 : -
Calculate the A.M.and S.D. for the following distribution:
50-60
60-70
70-80
18
16
12
10
5
2
1
Answer - 3 : -
A student obtainedthe 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, the correctfigure is 40. Find the correct mean and S.D.
Answer - 4 : -
Calculate the mean,median and standard deviation of the following distribution
Class-interval
31-35
36-40
41-45
46-50
51-55
56-60
61-65
66-70
3
8
Answer - 5 : -