Im trying to figure out how to find the estimated power of a statistical test. Heres what I have so far.

Table 1: correlation among minutes of exercise, BMI and depression:

Exercise in past week (minutes) and BMI is -0.15.

Exercise in past week (minutes) and depression score is -0.30*

Depression scores with BMI is 0.2

*p < 0.05

1.For the relationship between minutes of exercise and BMI,

a.what was the estimated power of the statistical test? (Using the power table on page 202, table 9.1, Polit 2010).

Correlation Coefficient R for exercise and BMI is -0.15.

The sample size is 100.

Using the table on pg 202, for the power of -0.15, 100 is between 92 and 130, which correlates with -0.30 and -0.40 via chart. (100 is between -0.30(92) and -0.40(130))

a. Therefore the estimated power of statistical test is ???

b.What was the risk that a type II error was committed?