Question 161632: CAN SOMEONE HELP ME WITH THIS PROBLEM:
Use technology to compute r, the correlation coefficient.
The following are costs of advertising ( in thousands of dollars) and the number of products sold (in thousands):
Costs 9, 2, 3, 4, 2, 5, 9, 10
Number 85, 52, 55, 68, 67, 86, 83, 73
Answer by gonzo(654)   (Show Source):
You can put this solution on YOUR website! i went online to find a correlation coefficient calculator.
found one on
http://www.fon.hum.uva.nl/Service/Statistics/Correlation_coefficient.html
entered the data as you described it.
9 85
2 52
3 55
4 68
2 67
5 86
9 83
10 73
--------
answer i got is
R = 0.7077, p <= 0.055 (t = 2.454, DF = 6)
y = 2.788 * x + 55.79
-----
looks like your R factor is .7077.
probability of error is <= 0.055.
t factor is 2.454 with 6 degrees of freedom.
equation of the regression line is
y = 2.788 * x + 55.79
-----
neat tool.
real easy to use.
| |
|
