Question

The table provides information on road accidents reported to the police for the days in DecemberEstimate the mean.
Give your answer rounded to 1 DP.

Answer 1

Answer:

8.161

Step-by-step explanation:

class mark = (lower limit+upper limit)/2

Now,

x1 = (1+7)/2 = 4 f1 = 17 f1x1 = 68

x2 = (8+12)/2 = 10 f2 = 7 f2x2 = 70

x3 = (13+17)/2 = 15 f3 = 5 f3x3 = 75

x4 = (18+22)/2 = 20 f4 = 2 f4x4 = 40

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total sum(fn) = 31 sum(fnxn) = 253

So, mean = sum(fnxn)/sun(fn)

= 253/31 = 8.161.