107_9.1_notes_quiz

Which of the following is NOT a type of alternate hypothesis?

• Left-tailed

• Right-tailed

• Two-tailed

• Middle-tailed

What is the second step in the four-step process of statistical analysis?

• Collect data needed to answer the questions.

• Formulate questions.

• Describe the data.

• Draw conclusions, using appropriate methods.

What is the purpose of the investigative process of statistics?

• To draw conclusions using appropriate methods.

• To define the null and alternate hypotheses.

• To describe the reasoning used in hypothesis testing.

• To distinguish between Type I and Type II errors.

What is the mean score on the exam according to the instructor's claim?

• 50

• 78

• 80

• 100

What is concluded if the null hypothesis is rejected?

• The null hypothesis is true

• The alternate hypothesis is true

• The sample mean is incorrect

• The test statistic is small

What is the null hypothesis (H0) in Example 9.2?

• μ = 20

• μ < 20

• μ > 20

• μ ≠ 20

What is a Type II error?

• Failing to reject H0 when it is false.

• Rejecting H0 when it is true.

• Rejecting H0 when it is false.

• Failing to reject H0 when it is true.

What does a Type I error result in?

• A false conclusion

• No conclusion

• A correct decision

• An inconclusive result

What is the decision if H0 is false and we fail to reject it?

• Type II Error

• Correct Decision

• Type I Error

• Incorrect Decision

If the true mean is μ = $55,000 and the dean does not reject H₀, what type of error is this?

• Type I error

• Type II error

• Correct decision

• No error