Two data sets P and Q each contain the weekly pocket-money (in rupees) of 20 students

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

Problem

Two data sets P and Q each contain the weekly pocket-money (in rupees) of 20 students. Their standard deviations are 12 and 9 respectively. Which data set shows greater dispersion? (a) Both

P

and

Q

have equal dispersion (b)

Q

(c)

P

(d) The information is insufficient to decide

Related theory

Variance and Standard Deviation
Measures of Spread
Statistics
Central tendency of ungrouped data
Range
Summary Statistics

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