- 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.

| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
---|---|---|---|---|---|---|---|

| 248 | 567 | 1402 | 728 | 419 | 456 | 203 |

What is the estimated mean for the population? Explain your answer and show your work.

UWUxONIxSAN Feb 19, 2019

#1**+3 **

We can use a "weigthed average" here

The total number of pets owned =

1(248) + 2(567) + 3(1402) + 4(728) + 5(419) + 6(456) + 7(203) = 14752 (1)

And the total nuber of adults = 248 + 567 + 1402 + 728 + 419 + 456 + 203 = 4023 (2)

So...the average (mean) is (1) / (2) = 14752 / 4023 ≈ 3.66 pets

CPhill Feb 19, 2019