Question

A pet food company wants to know the number of pets owned by adults ages 21 to 70. The frequency table shows the data from a simple random sample of the targeted population.

Answer 1

Solution:

To calculate the estimated mean, we will use the formula below

$mean=\frac{\sum_^fx}{\sum_^f}$

By substituting the values, we will have

$\begin{gathered} mean=\frac{\sum^fx}{\sum^f}=\frac{(248\times1)+(567\times2)+(1402\times3)+(728\times4)+(419\times5)+(456\times6)+(203\times7)}{248+567+1402+728+419+456+203} \\ mean=\frac{14752}{4023} \\ mean=3.67 \\ mean=4 \end{gathered}$

Hence,

The final answer is approximately

$\Rightarrow4\text{ }$