Question

You might need: m CalculatorThe following table shows the number of fire hydrants in each neighborhood overseen by Fire District 9.NeighborhoodNumber of fire hydrantsClearwater Estates17Shamrock Oak15Hidden Village21Tower Terrace12Y?Prairie PassCoIf the mean of the data set is 15 fire hydrants, find the number of fire hydrants in Prairie Pass.fire hydrants

Answer 1

We are given the number of fire hydrants for 4 neighbourhoods to be:

`17,\text{ 15, 21 and 12}`

The mean of the data set is given to be 15

Let the number of fire hydrants for Prairie Pass be x

The mean of a set of data is calculated using the formula:

`\begin{gathered} \text{Mean }=\text{ }(\sum^n_(n\mathop=1)x)/(n) \\ \text{where n is the total number of data points} \\ \text{and }\sum ^n_(n\mathop=1)\text{ means summation} \end{gathered}`

There are four (4) neighbourhoods hence :

`n\text{ = 4}`