Question

1. State the critical value from Table A-5 for n=12 and significance level of 0.1.

1. .602
2. .576
3. .735
4. .708

2. In a random sample comparing the variable y to the variable x, we find that r=0.9 , which is greater than the critical value found in table A-5, so it is concluded that a linear correlation exists. What proportion of the variation in y is explained by the linear correlation between x and y?

1. 10%
2. 81%
3. 5%
4. 30%

3. From problem #2, what proportion in the variation of y is explained by factors other than the linear correlation between x and y?

1. 10%
2. 19%
3. 81%
4. 5%

Answer 1