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Inference About a Mean Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Which of the following is TRUE about effect size in hypothesis testing?

Question 2 2. How many hypotheses do you write in a hypothesis test?

Question 3 3. A scientist is testing the growth speeds of a species of algae, and makes the following null hypothesis: Specimens of this species grow at a rate of at least v. They set their region of acceptance at 95% or higher, and find that 93% of the specimens grow at a rate of at least v. What should the scientist do and why?

Question 4 4. When is a type II error made?

Question 5 5. Which of the following is TRUE, according to the central limit theorem?

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Question 6 6.

Which of the following is an appropriate alternative hypothesis for this null hypothesis?

'Girls score 10 points higher than boys'

Question 7 7. Which of the following represents the probability of making a type II error?

Question 8 8. Which of the following statements is an implication of the central limit theorem?

Question 9 9. If the region of acceptance for a certain hypothesis is from 0% to 5%, then which of the following results is within the region of acceptance?

Question 10 10. Sharon is completing a hypothesis test. She wants to know if a Great Dane eats 10 or more pounds of meat every day. Her null hypothesis is that Great Danes eat less than 10 pounds of meat each day. Which of the following p-values will lead Sharon to reject the null hypothesis at the 0.05 significance level, and therefore conclude that Great Danes eat 10 pounds or more of meat each day?

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Question 11 11. How many hypotheses are there in hypothesis testing?

Question 12 12. A scientist is measuring the diameters of tree trunks, measuring twenty trees per trip. If the scientist increases their sample size to thirty per trip, then what change should they expect to see in the means of the samples?

Question 13 13. How many types of errors can be made when interpreting statistical results?

Question 14 14. Which of the following method(s) can be used to determine if the data fits the hypothesis?

Question 15 15. What is the first step in a hypothesis test?

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Question 16 16. Which of the following is an implication of the central limit theorem?

Question 17 17. Which of the following is NOT a step of hypothesis testing?

Question 18 18. A scientist publishes a paper where they assert that their null hypothesis about the speeds required for clouds to form is false. They later find that clouds actually form much more quickly than they'd described in the paper, closer to the speeds described in the null hypothesis. What sort of error did the scientist make, and why?

Question 19 19. What is a hypothesis?

Question 20 20. What does the effect size tell us?

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Question 21 21. Which of the following represents the probability of making a type I error?

Question 22 22. You are testing five different kinds of dog food to see which one gives dogs the most energy. Dog food 1 has an effect size of 0. Dog food 2 has a small effect size. Dog food 3 has a large effect size. Dog food 4 has a medium effect size. Dog food 5 has a small effect size. Which dog food performs the best?

Question 23 23.

For your hypothesis, you believe that many people own dogs.

What kind of effect size would tell you that?

Question 24 24. How many steps are there in hypothesis testing?

Question 25 25. Assuming that the population is not normally distributed to begin with, what will happen to the sample means with a large enough sample size?

Inference About a Mean Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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