## PSYC 255 Quiz 7

## Liberty PSYC 255 Quiz 7 Answers

- The general form of a regression equation is _____.
- Which of the following statements is true about eﬀect size?
- Which of the following is a measure of central tendency?
- A consumer analyst asks participants to rate the health benefits of two health drinks— EnerG and Supreme. EnerG is rated more nutritive with a mean of 5.5 than Supreme, which is found to have a mean of 4.3. The Type II error would be to conclude that EnerG is:
- After establishing that there is a reasonably high correlation between two variables, a researcher can utilize a regression equation to make predictions about the _____ variable from the _____ variable.
- The research hypothesis states that the:
- Statistically, significant results mean that the results are:
- Which of the following statements is true about bar graphs?
- Workers at an automobile repair shop report that half of the automobiles they repair have a resale value below $8000. In this example, which measure of central tendency does the $8000 represent?
- Variables with _____ scale levels exhibit minimal quantitative distinctions.
- Latifah measures the height of four‑ and five‑year‑ To her surprise, she finds no correlation between height and age. What is most likely responsible for this result?
- A desired probability of correctly rejecting the null hypothesis is the _____.
- In the original Mozart eﬀect study, researchers examined the eﬀect of exposure to classical music on spatial reasoning. In this case, exposure to classical music and spatial reasoning are examples of _____ variables.
- According to Rosenthal and Rosnow, when compared to nonvolunteers, volunteers tend to be:
- A researcher would employ structural equation modeling because:
- Using the Internet for research may lower the external validity of a study because users are more likely to share similar characteristics. In this case, volunteers of online surveys are likely to
- Which of the following is true of conceptual replications?
- The diﬀerence between an interval and a ratio scale is that a ratio scale _____, while an interval scale does not.
- Research on the results of laboratory and field experiments that examine the same variables suggests that:
- Inferential statistics _____.
- A _____ is a set of statistical procedures for combining the results from a number of studies in order to provide a general assessment of the relationship between variables.
- The null hypothesis is rejected whenever
- A Type I error is a decision to
- Inferential statistics allow us to arrive at conclusions about the _____ on the basis of _____ data.
- If Dean Johnson takes an aptitude test for a position with Engineers Incorporated, the criterion variable is Dean’s
- The likelihood of the occurrence of some event or outcome is referred to as
- Which statement is LEAST correct when graphing the relationship between variables?
- When a researcher _____ the probability of making a Type I error, she _____ the probability of making a Type II error.
- A criterion variable is generally analogous to a(n) ________ variable in the experimental method.
- A negative value of r means that – those who score high on one variable tend to score
- Which statement is LEAST correct regarding the correlation coefficient?
- A one tailed statistical test is used when
- Which statistical test would be most appropriate to examine the relationship between temperature and number of ice cream cones sold during the month of July?
- The range and the standard deviation are both
- Ratio scales
- Which one of the following is NOT one of the three basic ways of describing results discussed in your text?
- Which one of the following is NOT a measure of central tendency? – Meridian
- Results are generally said to be statistically significant when there is a ________ probability of the results occurring if the population means are actually equal.
- Rejecting the null hypothesis when it is true is called a ________ error, whereas not rejecting a false null hypothesis is called a ________ error.
- The measure of central tendency that reflects the most frequent score is the
- variance is the deviation of the group means from the grand mean.
- How does restricting the range of a variable affect the correlation coefficient?
- Dr. Afzal finds that students who work less than 10 hours a week have significantly higher test scores than students who work more than 10 hours a week. In order to determine the magnitude of the effect of work hours on test scores, he should calculate an estimate of the
- One way to assess whether pretesting creates a generalization problem is to:
- The “Mozart effect” provides an interesting example of the importance of
- When examining the strength of the relationship between study time and test score, the null hypothesis would suggest that the true population correlation is:
- Researchers studying the effectiveness of a diet on heart disease divided the study’s participants into two groups—those with Type A personalities and those with Type B personalities. Which scale of measurement characterizes these personality variables?