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10th CBSE
IMPORTANT
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Important Questions on Statistics

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10th CBSE
IMPORTANT
The algebraic sum of the deviations of a frequency distribution from its mean is
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10th CBSE
IMPORTANT
Which of the following cannot be determined graphically?
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10th CBSE
IMPORTANT

Consider the following distribution:

Marks obtained Number of students
More than or equal to 0 63
More than or equal to 10 58
More than or equal to 20 55
More than or equal to 30 51
More than or equal to 40 48
More than or equal to 50 42

The frequency of the class 30-40 is 
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10th CBSE
IMPORTANT
The abscissa of the point of intersection of the less than type and of the more than type cumulative frequency curves of a grouped data gives its
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10th CBSE
IMPORTANT
Average of first ten prime numbers is 
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10th CBSE
IMPORTANT
In the following distribution:
Monthly income range (in ) Number of families
Income more than  10000 100
Income more than  13000 85
Income more than  16000 69
Income more than  19000 50
Income more than  22000 33
Income more than  25000 15

The number of families having income range16000-19000 is
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10th CBSE
IMPORTANT

Consider the following frequency distribution of the heights of 60 students of a class: 

Height (in cm) Number of students
150-155 15
155-160 13
160-165 10
165-170 8
170-175 9
175-180 5

The sum of the lower limit of the modal class and upper limit of the median class is
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10th CBSE
IMPORTANT
Mean of 11 observation is 50. If the mean of first six observations is 49 and that of last six observations is 52, then the sixth observation will be: