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  1. 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.

Total pets owned

1

2

3

4

5

6

7

Number of adults

248

567

1402

728

419

456

203

 

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

 Feb 19, 2019
 #1
avatar+101871 
+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

 

 

cool cool cool

 Feb 19, 2019

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