Drivers Age years No of 30 50 50 0 750 1600 1400 1 75 120 120 2

Drivers age years no of 30 50 50 0 750 1600 1400 1 75

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Driver’s Age (years) No. of accidents 18 - 30 30 -50 >50 0 750 1600 1400 1 75 120 120 2 30 50 20 >2 10 15 12 Question 4 [25 Marks] The following data represent the rainfall (in mm) for the first 20 days of August. 29 18 12 42 25 22 17 9 19 35 27 31 7 16 36 19 52 48 39 29 4.1 What is the lowest rainfall recorded in the first 20 days? (1) 4.2 What is the median of the rainfall? (3) 4.3 Calculate for the first quartile; third quartile; and median rainfall for the first 20 days of August. (5) 4.4 Construct a box-and-whisker diagram for the data. (4) 4.5 What is the average rainfall for the first 20 days? (2) 4.6 What is the interquartile range? (3) 4.7 Calculate the standard deviation for the given data set. (7)
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