# Inferential Statistics in Psychology: Help and Review Chapter Exam

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#### Question 1 1. When a researcher fails to reject the null hypothesis, it is an example of a _____.

#### Question 2 2. The null hypothesis is a prediction that _____.

#### Question 3 3. A t-Test looks for _____ between _____.

#### Question 4 4. Which of the following would be an acceptable p-value for statistical significance?

#### Question 5 5. Between which of the following data does a chi-square measure the difference?

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#### Question 6 6. Which of the following is the best example of a null hypothesis?

#### Question 7 7. The t-value is supposed to be _____.

#### Question 8 8. When is it not appropriate to use a one-tailed test?

#### Question 9 9. If the null hypothesis states, 'There is no relationship between the amount of sleep a person gets each night and the amount of coffee they drink,' which of the following could be an example of an alternative hypothesis for this study?

#### Question 10 10. Brian plans to have one group participate in different lengths of meditation time for his study to determine whether meditation affects body weight. After each length of meditation time, he will measure the body weight of each individual in the group. Brian's assistant, Barney, is worried that they will not see a big difference in the body weight of the participants from the first post-meditation weigh-in to the subsequent weigh-ins. What phenomenon is Barney worried about?

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#### Question 11 11. Brian wants to know if there is a significant difference between the means in the study he is conducting. What value does Brian need to examine?

#### Question 12 12. Why is a two-tailed test sometimes referred to as the non-directional hypothesis?

#### Question 13 13. A civil engineer is trying to prove that his new method of laying blocks is more effective than the traditional method. The engineer will conduct a:

#### Question 14 14. When are degrees of freedom lost?

#### Question 15 15. Which of the following types of data are required in order to run a chi-square?

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#### Question 16 16. The _____ is a test where all of the significance is on only one side of the bell curve.

#### Question 17 17. A teacher wants to compare the reading comprehension skills of children with learning disabilities and children without learning disabilities. Which statistical test should she use to make this comparison?

#### Question 18 18. If your data produces a p-value of 0.12, which of the following would be true concerning your study?

#### Question 19 19. The chi-square formula cannot function if the number of observed or expected is below which of the following?

#### Question 20 20. If an experiment is shown to be statistically significant, then which of the following would be true?

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#### Question 21 21. Which of the following is a p-value that would show statistical significance?

#### Question 22 22. You are observing a psychologist run a chi-square. You see the psychologist take his number of categories and subtract 1. Which of the following is the psychologist calculating?

#### Question 23 23. If a researcher incorrectly rejects a null hypothesis, it is an example of a _____.

#### Question 24 24. A teacher wants to compare children of high, medium, and low family incomes on their satisfaction with the school lunch program. Which statistical test should be used to make this comparison?

#### Question 25 25. Brian is conducting a study to determine whether meditation affects body weight. Brian plans to have three different groups, where each group will be assigned a different length of meditation time. When Brian gathers his data, he will compare the body weights of the participants between groups. Which type of ANOVA is Brian using?

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#### Question 26 26. Frank performs an experiment to determine whether the amount of cookies a person eats has an affect on their blood sugar level. Frank finds a strong relationship between the amount of cookies a person eats and their blood sugar level, with a p-value of 0.02. Which of the following shows the correct way for Frank to report his findings? How does one properly write that the alternative hypothesis was correct?

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Question 27
27.
Some high school students were divided into two groups, group A and group B, and given the same test.

Group A consisted of 6 students and the average score was 12 with a standard deviation of 2. Group B consisted of 8 students and the average score was 11 with a standard deviation of 3. The variability within the groups is:

#### Question 28 28. On which of the following cases would an Analysis of Variance (ANOVA) be useful?

#### Question 29 29. Identify the statement that appropriately describes the null hypothesis:

#### Question 30 30. In order to conduct a study to determine whether meditation affects body weight, Brian plans to have one group participate in different lengths of meditation time. After each length of meditation time, Brian will measure the body weight of each individual in the group, which is _____ form of ANOVA.

#### Inferential Statistics in Psychology: Help and Review 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!