The travel times (in minutes) to work for a random sample of employees are shown in...

Question

Question

The travel times (in minutes) to work for a random sample of employees are shown in the frequency table below. What is the mean of the times?

Answer 1

Answer #1

Solution:

Given that

class mark frequancy mid point freq * midpoint

0-10 25 5 125

11 - 21 17 16 272

22- 32 12 27 324

33- 43 8 38 304

44 - 54 7 49 343

55 - 65 2 60 120

The mean of sample is $\bar x$

$\bar x$ = $\sum$ x/n

$\bar x$ = 1488 / 71

$\bar x$ = 20.96

he sample mean is 20.96

Answer 2

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