suncom is studyingSolutionFor Arithmetic mean find the sum a

Solution

For Arithmetic mean find the sum and divide by the no of items.

Sum = 1170

Mean = 1170/12 =97.5

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2) a) Formula for sample mean = sample total/no of items

b) Sample mean = 267100/4 = 69275

c) Sample mean is a statistic as a parameter pertains to population while statistic pertains to sample

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3) Population mean = sum/population size

b) Population mean = 498/311=1.6012

c) This is a parameter as it is mean of population.

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5) For median first arrange in ascending order the data

59,853,878,960,1130,1374

There are 2 middle items

Median = average of these 2 = 919

There are 3 observations below median, and 3 above.

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5) In ascending order the data will be

0, 0,6,8,10,14

There are two middle items

Median = average of 6 and 8 =7

b) Below median 3

c) Above median 3 items

d) MOde = 0 ( as this is repeated more)