Last year it was a 100% increase while this year it is a 50% decrease.
Answer:
Step-by-step explanation:
Given that the linear correlation coefficient r is found to be 0.591
the critical values are r equals plus or minus 0.878.
Significance level used = 0.05
The correlation r = 0.591
![H_0:r=0\\H_a: r\neq 0](https://tex.z-dn.net/?f=H_0%3Ar%3D0%5C%5CH_a%3A%20r%5Cneq%200)
(two tailed test)
Test statistic = ![\frac{r\sqrt{n-2} }{\sqrt{1-r^2} } \\=0.7326*df](https://tex.z-dn.net/?f=%5Cfrac%7Br%5Csqrt%7Bn-2%7D%20%7D%7B%5Csqrt%7B1-r%5E2%7D%20%7D%20%5C%5C%3D0.7326%2Adf)
Since r is less than 0.878, we accept that there is linear correlation between the two variables.
√70 = 8.37
It would be between 8 and 9.