You found that your intervention statistically significantly increased self-efficacy in your treatment group compared to your control; p-value <0.05. Select all statements that apply.

a. The chance that your study is biased is less than 5%.

b. If intervention had no effect on self-efficacy, the probability of finding your observed (or a more extreme) study result is less than 5%.

c. The probability that your study result occurred by chance is 20%.

d. Statistical significance implies that your study did not have substantial systematic error.