Activity- statistics problems
Problem 1
If n =10, = 12 and
INTERPRETATION OF PROBLEM
Previous knowledge
Solution:
σ=
σ=
σ=
σ=
σ=
σ=3
Problem 2
Problem No.1 of excercise No.6.1 Find the Standard deviation for the following data.
x | 03 | 08 | 13 | 18 | 23 |
f | 07 | 10 | 15 | 10 | 08 |
INTERPRETATION OF PROBLEM
Previous knowledge
Solution:
x | f | fx | x² | fx² |
03 | 07 | 021 | 009 | 0063 |
08 | 10 | 080 | 064 | 0640 |
13 | 15 | 195 | 169 | 2535 |
18 | 10 | 180 | 324 | 3240 |
23 | 08 | 184 | 529 | 4232 |
n=50 | Σfx=660 | Σfx²=10710 |
Standard deviation σ=
σ=
σ=
σ=
σ=6.3