Data from a small bookstore are shown in the table below. The correlation for the data is 0.967. complete parts A through D.
Data
| no. of sales people working |
sales (in thousands) |
| 3 |
11 |
| 4 |
12 |
| 5 |
13 |
| 9 |
14 |
| 11 |
19 |
| 11 |
21 |
| 13 |
21 |
| 15 |
23 |
| 17 |
23 |
| 18 |
27 |
|
|
| x? (mean for x ) = 10.6 |
mean for y = 18.4 |
| SD (x) = 5.34 |
SD (y) = 5.52 |
A- If the no. of people working is 2 standard deviations above the mean, how many standard deviations above or below the mean you expect sales to be?
B- What value of sales does the correspond to?
C- If the no. of people working is 1 standard deviations below the mean, how many standard deviations above or below the mean you expect sales to be?
D- What value of sales does the correspond to?