Difference between revisions of "Activity- statistics problems"
Jump to navigation
Jump to search
gonaljeelani (talk | contribs) |
gonaljeelani (talk | contribs) |
||
Line 143: | Line 143: | ||
|32 | |32 | ||
|128 | |128 | ||
− | |-2 | + | | -2 |
− | |-8 | + | | -8 |
|4 | |4 | ||
|16 | |16 | ||
|- | |- | ||
|34-38 | |34-38 | ||
− | | | + | |7 |
− | | | + | |36 |
− | | | + | |252 |
− | | | + | | -1 |
+ | | -7 | ||
+ | |1 | ||
+ | |7 | ||
|- | |- | ||
|38-42 | |38-42 | ||
− | | | + | |9 |
− | | | + | |40 |
− | | | + | |360 |
− | | | + | |0 |
+ | |0 | ||
+ | |0 | ||
+ | |0 | ||
|- | |- | ||
|42-46 | |42-46 | ||
− | | | + | |11 |
− | | | + | |44 |
− | | | + | |484 |
− | | | + | |1 |
+ | |11 | ||
+ | |1 | ||
+ | |11 | ||
|- | |- | ||
|46-50 | |46-50 |
Revision as of 05:54, 14 August 2014
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
Problem 3
Problem No.5 of excercise No.6.3
Find the varience and Standard deviation for the following data.
class intervals(CI) | 30-34 | 34-38 | 38-42 | 42-46 | 46-50 | 50-54 |
freequency(f) | 04 | 07 | 09 | 11 | 06 | 03 |
INTERPRETATION OF PROBLEM
Previous knowledge
Solution:
C.I. | f | x | fx | d= | fd | d² | fd² | |
30-34 | 4 | 32 | 128 | -2 | -8 | 4 | 16 | |
34-38 | 7 | 36 | 252 | -1 | -7 | 1 | 7 | |
38-42 | 9 | 40 | 360 | 0 | 0 | 0 | 0 | |
42-46 | 11 | 44 | 484 | 1 | 11 | 1 | 11 | |
46-50 | 08 | 184 | 529 | 4232 | ||||
50-54 | n=50 | Σfx=660 | Σfx²=10710 |
Standard deviation σ=
σ=
σ=
σ=
σ=6.3