Question

Month Weight (lbs)

January 13.5
February 12.5
March 10.5
April 11.2
May 11.2
June 10.8
July 9.5
August 13.4
September 11.5
October 11.8


Heather recorded the weight of her cat Sally for the past ten months. She is going to the vet this month. She is predicting that the cat's weight will be close to the mean of her data. About how much is she predicting that Sally will weigh?
A) 8 lbs
B) 10.9 lbs
C) 11.3 lbs
D) 11.6 lbs

Answer 1

`\boxed{\text{D. 11.6 lb}}`

Explanation:

The mean is the sum of the weights divided by the number of weighings.

`\text{Mean}= (13.5 + 12.5 + 10.5 + 11.2 + 11.2 + 10.8 + 9.5 + 13.4 + 11.5 + 11.8)/(10)\\\\= (115.9)/(10) \approx \mathbf{11.6}\\\\\text{Heather is predicting that Sally will weigh } \boxed{\textbf{11.6 lb}}`