Mean of Discrete Series
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Calculate arithmetic mean using direct method.
Wages (in Rs)1020304050Number of workers45321
Following information pertains to the daily income of 150 families. Calculate the arithmetic mean.
Income (in Rs)Number of FamiliesMore than 75150More than 85140More than 95115More than 10595More than 11570More than 12560More than 13540More than 14525
The following table gives the daily income of ten workers in a factory. Find the arithmetic mean.
WorkersABCDEFGHIJDaily Income (in Rs)120150180200250300220350370260
Find the mean daily wages of workers in a factory as per the data given below:
Daily wages ( in rupees) | |||||
Number of workers |
The mean ¯x of a discrete series of data is given by:
ΣFixi ⁄ΣFi
ΣFi ⁄Xi
ΣXi ⁄Fi
ΣFixi ⁄ΣX.F
Literacy rate (in %)No. of cities44−55355−651065−751175−85885−953
- 66.44
- 67.39
- 71.55
- 69.43
Wage (in Rs)Number of workers106208309404503
- Rs 18
- None of these
- Rs 26.66
- Rs 30
Literacy rate (in %)No. of cities44−55355−651065−751175−85885−953
- 66.44
- 69.43
- 67.39
- 71.55
Literacy rate (in %)No. of cities45−55355−651065−751175−85885−953
- 69.43
- 67.39
- 71.55
- 66.44
Calculate the weighted mean of the following distribution.
Items12291441Weight6452
For a distribution,
∑FX=5x+2, ∑F=12
If the mean of the distribution is 6, what is the value of x?
12
15
14
18
If the mean of the following data is 17 then the value of p is
X10p182125F1015799
Height110115x1120121125Number of students6814f143
- x1=118, f1=15
- x1=121, f1=15
- x1=118, f1=8
- None of these
The mean of the following distribution is
xi10131619fi2576
16
15.2
15.35
15.55
For the following data, mean of x is found to be 7.3. The missing frequency is
x : 5 6 7 8 9
f : 4 6 12 - 8
9
7
10
8