# Question

Consider the following sample of five values and corresponding weights:

xi wi

4.6 .......... 8

3.2 .......... 3

5.4 .......... 6

2.6 .......... 2

5.2 .......... 5

a. Calculate the arithmetic mean of the xi values without weights.

b. Calculate the weighted mean of the xi values.

xi wi

4.6 .......... 8

3.2 .......... 3

5.4 .......... 6

2.6 .......... 2

5.2 .......... 5

a. Calculate the arithmetic mean of the xi values without weights.

b. Calculate the weighted mean of the xi values.

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