Define a Type 1 error and a type 2 error and explain the consequences of each.

A researcher selects a sample from a population with a mean of 50 and administers a treatment to the individuals in the sample. If the treatment is expected to decrease scores, what is the correct statement for the alternative hypothesis for a one tailed test

The Food and Drug Administration (FDA) is charged with protecting consumers from unsafe and ineffective drugs on the market. Suppose an effective drug is being tested for safety using the hypotheses: Ho: Drug is safe        Ha: Drug is not safe a. Explain the consequence of type I error to the manufacturer. b. Explain the consequence of type II error to the manufacturer.

Which of the following conclusion would represent a Type II error? Concluding that the average voter turnout at presidential election will change when in fact turnout will not /did not change. Concluding that the average voter turnout at presidential election will not change when in fact turnout will / did change.

A researcher is testing if listening to 2 Chainz helps with studying. He finds that it does not. However, after more research is conducted, it is found that listening to 2 Chainz does indeed aid in studying. Is this Type I or Type II error?

A professor claims that the average grade of students in her courses is 80%. Identify Type II error for this claim. O Fail to reject the claim that average grade is 80% when it is actually 80%. O Fail to reject the claim that average grade is 80% when it is actually different from 80%. O Reject the claim that average grade is 80% when it is actually 80%. O Reject the claim that average grade is 80% when it is actually different from 80%.