Question 4 - A-Level Maths

Exam Board	CAIE
Module	S1 (Statistics 1)
Year	2023
Session	November
Topic	Data representation
Type	Draw histogram then perform calculations

4 The times, to the nearest minute, of 150 athletes taking part in a charity run are recorded. The results are summarised in the table.

Time in minutes	\(101 - 120\)	\(121 - 130\)	\(131 - 135\)	\(136 - 145\)	\(146 - 160\)
Frequency	18	48	34	32	18

Draw a histogram to represent this information.
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Calculate estimates for the mean and standard deviation of the times taken by the athletes.