The monthly fuel bills (in $) of a random sample of 50 motorists in a certain city
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Question:
The monthly fuel bills (in $) of a random sample of 50 motorists in a certain city in the US, who commute to work daily by car, was recorded in a recent survey. The data is presented in the table below.
Class Frequency
250 -310 12
310 -370 10
370-430 9
430-490 4
490-550 7
550-610 2
610-670 6
For the grouped data, calculate each of the following:
(1.1) Mean (2 Marks)
(1.2) Mode (3 Marks)
(1.3) Median (4 Marks)
(1.4) Variance (4 Marks)
(1.5) Standard Deviation (2 Marks)
Show all your workings and see attached formulas.
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