Question

The data set below provides the monthly rent (in dollars) paid by 5
tenants. 879,920,940,950,990 suppose the rent for one the tenants changes from $940 to $1115
What is the mean before the rent changes
A. Before $935.80 after 970.80
B.Before $940 after $936.80
C. Before $950.80 after $972
Best answer

Answer 1

To find the mean rent before the change occurs, we first calculate the mean of the original set of rents: 879, 920, 940, 950, and 990.

1. Calculate the sum of the rents:
\[
879 + 920 + 940 + 950 + 990 = 4679
\]

2. Divide the sum by the number of tenants (5):
\[
\text{Mean} = \frac{4679}{5} = 935.80
\]

So the mean rent before the change is **$935.80**.

After one tenant's rent changes from $940 to $1115, the new set of rents will be 879, 920, 1115, 950, and 990.

1. Calculate the new sum:
\[
879 + 920 + 1115 + 950 + 990 = 4854
\]

2. Calculate the new mean:
\[
\text{New Mean} = \frac{4854}{5} = 970.80
\]

Thus, the updated means are:
- Before: **$935.80**
- After: **$970.80**

Therefore, the best answer is:
**A. Before $935.80 after $970.80.**