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2 Unit 2: Applied Mathematics A

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Question 88

The annual mileage of each of 400 cars is recorded. For these cars, x x\,x is the annual mileage in thousands of miles, and

∑x=4800\sum x = 4800∑x=4800 and ∑x2=61 200\sum x^2 = 61\,200∑x2=61200

a.

Calculate the mean annual mileage of these cars.

[1]
b.

Calculate the standard deviation of the annual mileage of these cars.

[2]
Markscheme

2 Unit 2: Applied Mathematics A Questions

  1. A Level
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