The masses in kilograms of 50 children having a medical check-up were recorded correct to the nearest kilogram. The results are shown in the table. Mass (kg) $10-14$ $15-19$ $20-24$ $25-34$ $35-59$ --- --- --- --- --- --- Frequency 6 12 14 10 8 (i) Find which class interval contains the lower quartile. (ii) On the grid, draw a histogram to illustrate the data in the table.

Mathematics 9709/63 — May/June 2018

Cambridge A-Level · Probability & Statistics 1 (S1) · worked solutions for every part, with the mark scheme

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marks

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Topics Discrete Random Variables · Representation of Data · The Normal Distribution · Probability · Permutations and Combinations

Q1Representation of DataFree sample

The masses in kilograms of 50 children having a medical check-up were recorded correct to the nearest kilogram. The results are shown in the table.

Mass (kg)	$10-14$	$15-19$	$20-24$	$25-34$	$35-59$
Frequency	6	12	14	10	8

(i)

Find which class interval contains the lower quartile.

(ii)

On the grid, draw a histogram to illustrate the data in the table.

Fig. 1

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