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Recent questions tagged statistics

The weighted A.M of first $n$ natural numbers whose weights are equal is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The A.M of set of 50 numbers is 48. If two numbers 52 and 44 are discarded then A.M of the remaining set of numbers is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The S.D of first $n$ naturals is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

Geometric mean of $ 1, 2, 2^2, 2^3.....2^n$ is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

Mode of the data : \[\] 5, 7, 2, 7, 7, 4, 7, 7, 6, 7 is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

Median of 16, 10, 14, 11, 9, 8, 12, 6, 5 is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

If mode of a data is 27 and mean is 24, then median is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

Mean of 100 items is 49. It was discovered that 3 items 60, 70, 80 were wrongly read as 38,22,50 respectively. The correct mean is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

A car owner buys petrol at Rs. 7.50 Rs. 8.00 and Rs. 8.50 per litre for the 3 successive years. If he spends Rs. 4000 each year, then the average cost per litre of petrol is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The weighted mean of first $n$ natural numbers whose weights are equal to the squares of the corresponding numbers is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

If the mean of the set of numbers $ x_1, x_2.....x_n$ is $ \overline x$ then mean of the numbers $ x_i+2i \: \: 1 \leq i \leq n $ is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The average salary of male employees in a factory was Rs. 520 and that of females was Rs. 420. If mean salary of all employees is Rs. 500, the % of male employees is?

asked Jan 25, 2014 by thanvigandhi_1

1 answer

If a student gets marks : English 80, Hindi 70, Mathematics 85, Physics 75 and Chemistry 67 and the weights of subjects are 1,2,1,3,1 respectively then weighted A.M is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The average weight of 25 boys was calculated to be 78.4 kg. It was later discovered that one weight was misread as 69 kg instead of 96 kg. The correct average is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The A.M of 9 items is 15. If one more item is added to this series, the A.M becomes 16. The value of 10th item is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

If A.M of $x_1, x_2....x_n$ is $ \overline x$ then A.M of $ ax_1+b, ax_2+b, ax_3+b...ax_4+b$ is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The A.M of $ nC_0, \: nC_1, nC_2.......nC_n$ is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The A.M of $a, a+d, a+2d.....a+2nd$ is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The A.M of squares of first $n$ natural numbers is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The A.M of first $n$ natural number is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

A batsman scores $ 38, 70, 48, 34, 42, 55, 63, 46, 54 \: and \: 44$ in 10 innings. Find his mean deviation from median.

asked Jan 25, 2014 by thanvigandhi_1

1 answer

Find the median of the data 21, 39, 27, 31, 23, 41, 49, 29.

asked Jan 25, 2014 by thanvigandhi_1

1 answer

Mean of 10 items was found to be 15. On verification it was found that an item 21 was miscopied as 12. Find the correct mean.

asked Jan 25, 2014 by thanvigandhi_1

1 answer

Find the geometric mean of 5 numbers 2, 8, 16, 128, 512

asked Jan 24, 2014 by thanvigandhi_1

1 answer

Find the mean of first $n$ odd natural numbers.

asked Jan 24, 2014 by thanvigandhi_1

1 answer

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