Recent questions tagged statistics-and-probability

The modal class for the following frequency distribution is ________

asked Nov 10, 2014 by meena.p

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The median class for the following distribution is _______

asked Nov 10, 2014 by meena.p

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The class marks of classes $15-35$ and $20-40$ is________

asked Nov 10, 2014 by meena.p

1 answer

The mean of the following data is $20.6$ , then the value of p is _________

asked Nov 10, 2014 by meena.p

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If the mean of the following distribution is $2.6$ , then the value of k is

asked Nov 10, 2014 by meena.p

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The mode and mean are $26.6 $ and $ 28.1$ respectively in a distribution then its median is _______

asked Nov 10, 2014 by meena.p

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The times in seconds taken by $150$ athletes to run $110 \;m$ hurdle race an given below . The no.of athletes whose completed the race in less than $14.6$ seconds is __________

asked Nov 10, 2014 by meena.p

1 answer

If $x_i$'s are the midpoints of the class intervals of grouped data, $f_i$'s are the corresponding frequencies and I is the mean, then $ \sum (f_i x_i - \bar {x} )$ is equals to ______

asked Nov 10, 2014 by meena.p

1 answer

Two dice are thrown simultaneously. The probability of getting six as product is _________

asked Nov 7, 2014 by meena.p

1 answer

A box of 600 electric bulks contains 12 defective bulks. One bulls is taken out at random from this box. Then the probability that it is a non- defective bulb is ______

asked Nov 7, 2014 by meena.p

0 answers

One card is drawn from a well shiffled deck of 52 cards. Then the probability of drawing 10 of a black suit is _____

asked Nov 7, 2014 by meena.p

1 answer

The probability that a leap year selected at random, will contain 53 sundays is _______

asked Nov 7, 2014 by meena.p

1 answer

Two dice are thrown simultaneously. The probability o getting six as the product is ________

asked Nov 7, 2014 by meena.p

1 answer

On throwing two cubical dice simultaneously, the probability that the sum of the digits on the top faces of the two dice is greater than 7 or less than 7 is

asked Nov 7, 2014 by meena.p

1 answer

The probability of getting a sum greater than 15 on throwing 3 dice is ______

asked Nov 7, 2014 by meena.p

1 answer

When three coins are tossed simultaneously, the probability of getting at least one tail is _______

asked Nov 7, 2014 by meena.p

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The mean weight of 8 numbers is 15. If each number is multiplied by 2, the new mean is _____

asked Nov 6, 2014 by meena.p

1 answer

The mean of 11 number is 35. If the mean of first 6 number is 32 and that of last 6 number is 37, the sixth number is ______

asked Nov 6, 2014 by meena.p

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The mean of 5 numbers is 18. If one number is excluded their mean is 16. The excluded number is ________

asked Nov 6, 2014 by meena.p

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The mean of marks scored by 100 students was found to be 40, Later on it was discovered that a score of 53 was misread as $83$. The correct mean is ______

asked Nov 6, 2014 by meena.p

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The mean of 5 numbers is 18. If one number is excluded , their mean is $16^{\circ}$. then the excluded number is ________

asked Nov 6, 2014 by meena.p

1 answer

The mode of a frequency distribution can be determined graphically from

asked Nov 6, 2014 by meena.p

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The median of a given frequency distribution is found graphically with the help of

asked Nov 6, 2014 by meena.p

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The mean of a discrete frequency distribution $\large\frac{x}{f_i} $$; i=1,2,3,.n$ is given by

asked Nov 6, 2014 by meena.p

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If $\bar{x}$ is the means of n observations $x_1,x_2,.....x_n$ then the mean of the observations $x_1 -a, x_2 - a, ....... x_n - a$ is _________

asked Nov 6, 2014 by meena.p

1 answer

If $\bar{x}$ is the means of n observations $x_1,x_2,.....x_n$ then the mean of the observations $x_1 +a, x_2 +a, ....... x_n +a$ is _________

asked Nov 6, 2014 by meena.p

1 answer

If $\bar {x} $ is the mean of ten natural numbers $x_1,x_2,x_3......x_{10}$ , then $(x_1 - \bar {x}) +(x_2 - \bar {x})+ ..... (x_{10} - \bar {x} )$ is _______

asked Nov 6, 2014 by meena.p

1 answer

The variance of the first 50 even natural numbers is:

asked Apr 6, 2014 by balaji.thirumalai

1 answer

6 boys and 6 girls sit randomly in a row, what is thae probability that boys and girls sit alternately?

asked Feb 14, 2014 by bharathdon.999

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