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Q4 of 35 Page 375

The following is the record of goals scored by team A in a football session:


For the team B, mean number of goals scored per match was 2 with a standard deviation 1.25 goal. Find which team may be considered more consistent?


Mean =



=


Standard deviation σ = √variance = √1.2 = 1.09



For team B


Given


Standard deviation σ=1.25



Since C.V. of firm B is greater


∴ Team A is more consistent.


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2

From the prices of shares X and Y below, find out which is more stable in value:

3

An analysis of monthly wages paid to workers in two firms A and B, belonging to the same industry, gives the following results:


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(ii) Which firm, A or B, shows greater variability in individual wages?

5

The sum and sum of squares corresponding to length x (in cm) and weight y (in gm) of 50 plant products are given below:


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1

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Questions · 35
15. statistics
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