2.1 Suppose you keep track of your mileage each time you fill up. At your last 6

Question

2.1 Suppose you keep track of your mileage each time you fill up. At your last 6 fill-ups the mileage was

65311 65624 65908 66219 66499 66821 67145 67447

Enter these numbers into R . Use the function diff on the data. What does it give?

> miles = c(65311, 65624, 65908, 66219, 66499, 66821, 67145, 67447)

> x = diff(miles)

You should see the number of miles between fill-ups. Use the max to nd the maximum number of miles between fill-ups, the mean function to find the average number of miles and the min to get the minimum number of miles.

Explanation / Answer

Note that the R commands are in bold in this solution.

The given functions were inputted to generate an array of consecutive differences of the miles.

> miles = c(65311, 65624, 65908, 66219, 66499, 66821, 67145, 67447)
> x = diff(miles)

Now the maximum number of miles between fill ups is computed as:
> max(x)
[1] 324

Now the average number of miles between fill ups is computed as:
> mean(x)
[1] 305.1429

Now the minimum number of miles between fill ups is computed as:
> min(x)
[1] 280

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