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Find the mean number of cars owned for sample

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The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in their name, from a sample of 319 people. You will need to change the second column from "number" in each group to "percentage" in each group. Do this by dividing the number of items in each group by the total.

x 0 n 91
x 1 n 69
x 2 n 93
x 3 n 66

(a) Find the mean number of cars owned for this sample. Give your answer to at least 2 decimal places.

(b) Find the standard deviation of cars owned for this sample. Give your answer to at least 2 decimal places.

Reference no: EM132844616

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