531.The marks obtained by three students Vijay, Subhash and Kumar in 10 tests during an academic session have a mean of 50, 48 and 12 respectively. The standard deviation of their runs are 15, 12 and 2 respectively. Who amongst them is most consistent and who is least?
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Short Answer Type
532.Two workers on the same job show the following results over a large period of time: Worker Worker A B Mean time to complete 30 25 the job in minutes
Variance (minutes) 36 16 Which of the two workers is more consistent in the time he requires to complete the job?
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533.You are supplied the following data about the heights of boys and girls of class XI in your school.
who have more variabilty in height, boys or girls?
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534.Co-efficient of variation of two distributions are 60 and 70 and their standard deviations are 21 and 16 respectively. What are their arithmetic means ?
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535.Two plants A and B of a factory show following results about the number of workers and the wages paid to them. A B No. of workers 5000 6000 Average monthly wages Rs 2500 Rs 2500 Variance of distribution of wages 81 100
In which plant A or B is there greater variability in individual wages?
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536.The sum and sum of squares corresponding to length x (in cm) and weight y (in gm) of 50 plant products are given below: Which is more varying, the length or weight?
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Long Answer Type
537.Calculate M.D. from mean for the data:
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538.Calculate the mean deviation from the median for the data: 3011, 2780, 3020, 2354, 3541, 4150, 5000
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539.Calculate the mean deviation from the median for the data: 22, 24, 30, 27, 29, 31, 25, 28, 41, 42
Long Answer Type
Short Answer Type
