Recent questions tagged class9

Which of the following symbols represents the standard deviation of thepopulation?

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The variance can never be

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When data are positively skewed, the mean will usually be

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The most frequently occurring value of a data set is called the

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The difference between the largest and the smallest data values is the

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The 75th percentile is referred to as the

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The median is a measure of

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The median of a sample will always equal the

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The variance of a sample of 169 observations equals 576. The standard deviation of the sample equals

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Since the population size is always larger than the sample size, then the sample statistic

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Which of the following provides a measure of central location for the data?

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The sum of the percent frequencies for all classes will always equal

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Since the mode is the most frequently occurring data value, it

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In a five number summary, which of the following is not used for data summarization?

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If the mean of x+2, 2x+3, 3x+4 and 4x+5 is x+2 then find the value of x

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The mean deviation of \large\frac{a+b}{2} and \large\frac{a-b}{2} (where a and b>0) is

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The arethmetic mean and mode of the data is 24 and 12 respectively then the median of the data is

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The mean of first n odd natural numbers is $\large\frac{n^2}{81}$. Find n

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Range of 14,12,17,18,16 and x is 20 . Find x(x>0)

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The upper class limit of inclusive type class interval 10-20 is

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If the quartile deviation of a set of observations is 10 and the third quartile is 35, then first quartile is

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The median of 21 observations is 18. If two observations 15 and 24 are included to the observations then the median of the new series is

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If the difference of mode and median of a data is 24, then the diffrence of median and mean is

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Mean of a certain number of observations is m . If each observation is divided by $x(x\neq0)$ and increased by y, then the mean of new observation is

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The mean of first n natural numbers is \large\frac{5n}{9}. Find n

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If sum of the 20 deviations from the mean is 100, then the mean deviation is

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If the heights of five students in a class are 132cm,158cm,150cm 145cm and 155cm,then find their mean height.

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If the median of 33,28,20,25,34 and x is 29, then find the maximum possible value of x

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The mean of 8 observations was found to be 20 . Later it was detected that on eof the observations was found to be misread as 62. What is the correcr observation if the correct mean is 15.5 ?

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If lower and upper quartiles of the data are 23 and 25 respectively , then coefficients of quartile deviation is

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If the mean of 2,4,6,8 ,x and y is 5 then x+y is

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Mode of certain scores is x , If each score is decreased by 3 then mode of the new series is

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If mode and median of the certain scores are 2 and 2 then mean is

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If the mean of a,b and c is b ,then a+c in terms of b is

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The coefficient of range of the scores 1,2,3,4 and 5 is

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Mode of the scores 2,3,2,4,3,2,4,6 is

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Range of scores 27.35,47,36,25 and x where x<25 is 23, then x is

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If the lower boundary of a class is 35 and length of the class is 5, then upper boundary is

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In a class seven students got 90 marks each , the frequency of the observation 90 is

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A coin is tossed 20 times and head occurred 12 times . How many times did tail occur

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when a dice is rolled the probability that the number on the face showing up is greater than 6 is

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A bag contains 12 pencils , 3 sharpner and 7 pens . what is the probability of drawing a pencil from the bag.

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In a football Ronaldo makes 4 goals from 10 penalty kicks . Find the probability of converting a penalty kick into a goal by Ronaldo

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if A tells the truth $60\%$ of the time and B $85\%$ of the time.the probability that they will contradict each other when they are narrating the same incident is.....

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a bags contain 5 red and 6 black balls if 2 balls are selected at random what is probablity of getting.both balls of same colour?

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There is a point in a circle. What is the probability that this point is closer to its circumference than to the centre?

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Three boys P,Q and R are to speak at a function along with 5 others. If all of them speak in random order, what is the probability that P speaks before Q and Q speaks before R?

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A bag contains 4 blue, 5 white and 6 green balls. Two balls are drawn at random. What is the probability that one ball is white?

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A bag contains 4 blue, 5 white and 6 green balls. Two balls are drawn at random. What is the probability that both the balls are blue?

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A basket contains 15 apples and 10 oranges out of which 4 apples and 2 oranges are defective. If a person takes two fruits at random, what is the probability that either both are apples or both are good

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