# Inferential Statistics in Psychology: Homework Help Chapter Exam

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#### Question 1 1. A researcher asks a group of students to complete a survey that measures maturity. She finds that the average score for girls is higher than the average score for boys, with a p-value of 0.03. What should she conclude from this p-value?

#### Question 2 2. If an experiment is shown to be statistically significant, then which of the following would be true?

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Question 3
3.
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 4 4. The purpose of running an ANOVA is to find the _____ .

#### Question 5 5. In statistical equations, probability is usually represented by _____.

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#### Question 6 6. Which of the following p-values indicates that the findings of the experiment are statistically significant?

#### Question 7 7. 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?

#### Question 8 8. Which of the following types of data are required in order to run a chi-square?

#### Question 9 9. Which of the following is the best example of a null hypothesis?

#### Question 10 10. When a researcher fails to reject the null hypothesis, it is an example of a _____.

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#### Question 11 11. 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?

#### Question 12 12. Which of the terms below can be defined as 'an educated guess about a trend, group difference, or association believed to exist'?

#### Question 13 13. Which of the following would be an acceptable p-value for statistical significance?

#### Question 14 14. 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 15 15. 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.

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#### Question 16 16. 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 17 17. 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 18 18. On which of the following cases would an Analysis of Variance (ANOVA) be useful?

#### Question 19 19. Which of the following is a p-value that would show statistical significance?

#### Question 20 20. 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?

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#### Question 21 21. When are degrees of freedom lost?

#### Question 22 22. When is it not appropriate to use a one-tailed test?

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

#### Question 24 24. The _____ is a test where all of the significance is on only one side of the bell curve.

#### Question 25 25. The t-value is supposed to be _____.

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#### Question 26 26. A t-Test looks for _____ between _____.

#### Question 27 27. 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 28 28. The chi-square formula cannot function if the number of observed or expected is below which of the following?

#### Question 29 29. The null hypothesis is a prediction that _____.

#### Question 30 30. Identify the statement that appropriately describes the null hypothesis:

#### Inferential Statistics in Psychology: Homework Help 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!