A classic application of correlation involves the association between temperature and the number of times a cricket chirps in a minute. Listed below are the number of chirps in 1 minute and the corresponding temperature in °F.
| Chirps in 1 min |
882 |
1188 |
1104 |
864 |
1200 |
1032 |
960 |
900 |
|
Temp in °F
|
69.7 |
93.3 |
84.3 |
76.3 |
88.6 |
82.6 |
71.6 |
79.6 |
1. Construct a scatter plot
2. Find the value of the linear correlation coefficient r.
3. Find the critical values of r from attached table (see attachment). Use α = 0.05
Is there a linear correlation between the number of chirps in 1 minute and the temperature?