In a frequency distribution

MATHEMATICS · Single correct · A Level · Mathematics · Data presentation and interpretation · Data presentation and interpretation

Problem

In a frequency distribution, the value 10 occurs 2 times, 20 occurs f times and 30 occurs 2 times. The variance of the distribution is 16. Find f. (a)

28

(b)

21

(c)

10

(d)

16

Related theory

Variance and Standard Deviation
Measures of Spread
Statistics

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