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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.

A pet food company wants to know the number of pets owned by adults ages 21 to 70. The-example-1

1 Answer

7 votes

Solution:

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


mean=(\sum_^fx)/(\sum_^f)

By substituting the values, we will have


\begin{gathered} mean=(\sum^fx)/(\sum^f)=((248*1)+(567*2)+(1402*3)+(728*4)+(419*5)+(456*6)+(203*7))/(248+567+1402+728+419+456+203) \\ mean=(14752)/(4023) \\ mean=3.67 \\ mean=4 \end{gathered}

Hence,

The final answer is approximately


\Rightarrow4\text{ }

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