i. To prevent bias, the level of significance is selected before setting up the decision rule and sampling the population. ii. The fifth and final step in testing a hypothesis is taking a sample and, based on the decision rule, deciding if the null hypothesis should be rejected.
iii. When the null hypothesis is not rejected, the conclusion is that our sample data does not allow us to reject the null hypothesis.
A) (i), (ii), and (iii) are all correct statements.
B) (i) is a correct statement but not (ii) or (iii).
C) (i) and (iii) are correct statements but not (ii).
D) (i) and (ii) are correct statements but not (iii).
E) (i), (ii), and (iii) are all false statements.

Question

Quizplus · Accepted Answer

All three statements are correct and necessary components of hypothesis testing. The selection of the level of significance is important to prevent bias and ensure the validity of the results. The final step in testing a hypothesis is to take a sample and make a decision based on the established decision rule. When the null hypothesis is not rejected, the conclusion is that our sample data does not provide sufficient evidence to reject the null hypothesis.

I to Prevent Bias, the Level of Significance Is Selected