Question

Every 3 months the arena’s musical equipment needs safety checking. Look at a comparison of the last 4 years’ service costs.

Answer 1

Answer:

Year 4; Year 3

Step-by-step explanation:

To find the year that service was the cheapest, we look for the year with the smallest mean.

The mean is the average of a data set; it is found by adding together all data points and dividing by the number of data points.

A small mean means we have added together small values before we divided.  This means the service costs were small.

The year with the smallest mean was year 4.

To find the year that service prices were the most consistent, we look for the year with the smallest range.

The range is the difference between the highest and lowest values.  If a particular variable is consistent, this means this difference is small.  This means the year with the smallest range will be the most consistent year.

The year with the smallest range is year 3.

Answer 2

The cheapest service would be the year in which the mean was the lowest. In Year 4, the mean was the lowest.

The most consistent service would be the year in which the range was the lowest. In Year 3, the range was the lowest.