The range of the following ungrouped data will be:
30, 32, 45, 54, 74, 78, 108, 112, 66, 76, 86, 41, 14, 15, 35, 112.
The marks of 40 students in final exam obtained by students of class 9 is given below:
8, 18, 12, 6, 8, 16, 12, 5, 23, 2, 16, 23, 2, 10, 20, 12, 9, 7, 6, 5, 3, 5, 13, 21, 13, 15, 20, 24, 1, 7, 21, 16, 13, 18, 23, 7, 3, 18, 17, 16.
Q. The number of students in the class interval 5 – 10 are:
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The class marks distribution are:
25, 26, 27, 31, 36, 41, 46, 51, 57, 59
Q. The lower limit of first class interval will be:
Let ‘l’ be the lower limit of a class interval in a frequency distribution and ‘m’ be the mid-point of the class. Then the upper limit of the class is:
The mid value of a class interval is 14 and the class size is 2. The lower limit of the class is:
A frequency polygon is constructed by plotting frequency of the class interval and the
If the mean of x1, x2, x3 ……., xn is and 5 is added to each number, the new mean will be:
The mean of 10 numbers is 16. If two consecutive numbers are excluded, the new mean is 18. The sum of the excluded numbers is:
15 videos|63 docs|45 tests
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15 videos|63 docs|45 tests
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