NumericalModerate3 marks
The data on the number of patients attending a hospital in a month are given below. Find the average (mean) number of patients attending the hospital in a month by using the shortcut method. Take the assumed mean as 45. Give your answer correct to 2 decimal places.
Topic: Mean / median / mode / quartiles
Previous-year question practice database
Answer
Exam answer
Mean = 40.33 patients.
Explanation
C.I f mid-value d fd 10 - 20 5 15 -30 -150 20 - 30 2 25 -20 -40 30 - 40 7 35 -10 -70 40 - 50 9 45 0 0 50 - 60 2 55 10 20 60 - 70 5 65 20 100 30 -140 Given assumed mean (A) = 45 Mean = 45 + −140
= 45 – 4.67 = 40.33
More from Measure of Central Tendency (Mean, Median, Quartiles and Mode)
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