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
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?