## COUC 515 Quiz 2

## COUC 515 Quiz 2 Liberty University

- If the population mean and standard deviation is known, the researcher should use a _________.
- Nonparametric tests are tests that can be used when population parameters are not needed.
- The most robust experiments do not have a risk of error.
- It is typically suggested that researchers avoid terms like “prove.” What is true with respect to this statement?
- The Wilcoxon ranked sum test, is a nonparametric test. It is similar to the parametric independent samples t-test. According to Jackson, some of the assumptions of the Wilcoxon ranked sum-test include:
- Inferential statistics allows researchers to make inferences about a _____________ based on a ___________.
- Synonyms for the null hypothesis include:
- The central limit theorem involves _________.
- A frequency table helps researchers answer how often an event occurs and the frequency at which an event occurs.
- A Type II error is represented by “missing the findings” or failing to reject the null hypothesis when the null hypothesis is actually false.
- Regarding “Statistical Power,” the larger the sample size the greater the probability of ___________.
- One assumption of nonparametric statistics is the underlying distribution does not need to be normal.
- A ballroom dancing metaphor can be used to describe the nature of reporting results in terms of the null hypothesis because:
- Inferential statistics help researchers avoid making overgeneralizations based on one experience.
- Rejecting the null hypothesis when the null hypothesis is true is a type one error and not a type two.
- The z test is a parametric statistical test that allows us to test the null hypothesis for a single sample when the population variance is known.
- The chi-square (χ2) goodness-of-fit test is a nonparametric statistical test used for comparing categorical information against what we would expect based on previous knowledge.
- The alternative hypothesis (researcher’s hypothesis) represents what the researcher is trying to support.
- The difference between population means in terms of standard deviations is called the effect size.
- A test that can be used with nominal data is:
- The central limit theorem involves the distribution of sample means approaching normality.
- Chapter 13 in the Knight & Tetrault textbook discusses an example wherein a researcher is comparing the Emotional Intelligence of counseling students to the emotional intelligence of students of other majors. The researchers hypothesize that counseling students will have a higher emotional intelligence than students in other majors. Since this specifies a direction (scores on the EI assessment for counseling students will be greater than that of other students), the test is one tailed.
- The likelihood of a type one error is measured by _____.
- The Researcher’s hypothesis stating that counseling majors have a higher mean emotional intelligence (EI) than others majors in general, described above in the format of a formula would be _______________.
- A researcher is developing a study to examine the emotional intelligence between counseling majors and all other students. The researcher hypothesizes that the mean emotional intelligence of counseling majors will be greater than the mean emotional intelligence of all other students. This is an example of a_________________.