Question

The Taylors Have recorded their weekly grocery expenses for the past 12 weeks and determined that the mean weekly expense was 60.26. Later , Mrs.Taylor discovered that 1 weeks expense of $74 was incorrectly recorded as $47. What is the correct mean ? The correct mean is $ ____?

Answer 1

We are told that the Taylors Have recorded their weekly grocery expenses for the past 12 weeks and determined that the mean weekly expense was 60.26. Later , Mrs.Taylor discovered that 1 weeks expense of $74 was incorrectly recorded as $47.

We can find the correct mean weekly expenses by calculating the mean of difference between 74 and 47, then adding it to the given mean weekly expenses.

$\frac{74-47}{12}$

$\frac{27}{12}=2.25$

Now let us add 2.25 in 60.26 to find the correct mean weekly expenses.

$\text{Correct mean weekly expenses}=60.26+2.25$

$\text{Correct mean weekly expenses}=62.51$

Therefore, the correct mean weekly expenses for the Taylors will be 62.51.