Question

whats the mean
70,-85,-73,-84,-82,84,78,87,-72,-83

Answer 1

To find the mean (average) of a set of numbers, you sum all the numbers together and then divide by the total number of values.

Here are the numbers you provided:

70, -85, -73, -84, -82, 84, 78, 87, -72, -83

First, let's calculate the sum:

\[
70 + (-85) + (-73) + (-84) + (-82) + 84 + 78 + 87 + (-72) + (-83)
\]

Calculating this step-by-step:

1. \(70 - 85 = -15\)
2. \(-15 - 73 = -88\)
3. \(-88 - 84 = -172\)
4. \(-172 - 82 = -254\)
5. \(-254 + 84 = -170\)
6. \(-170 + 78 = -92\)
7. \(-92 + 87 = -5\)
8. \(-5 - 72 = -77\)
9. \(-77 - 83 = -160\)

The total sum is \(-160\).

Now, we divide by the number of values (which is 10):

\[
\text{Mean} = \frac{-160}{10} = -16
\]

Therefore, the mean of the numbers is \(-16\).