2022 Introduction to Statistics in Research Mitchell 2nd ed

I N T R O T O R E S E A R C H : D A T A V I S U A L I Z A T I O N & C O M M O N S T A T T E S T S

Question 1: When all members of a population have an equal chance of being selected to participate in a study, you are using ______. a. random assignment

b. cluster sampling c. nonresponse bias d. probability sampling

Answer: d

Question 2: A researcher wants to investigate the social media site Twitter, in order to understand who uses it and for what purpose. The researcher also wants to examine the relationship between age and frequency of Twitter use. What two type of studies

should the researcher design? a. descriptive and experimental b. correlational and experimental c. experimental and quasi-experimental d. descriptive and correlational

Answer: d

Question 3: Which of the following statements is true? a. Typically, a study involves only one type of statistical analysis. b. Correlational studies utilize only correlational statistics. c. Typically, you should run descriptive statistics in any study. d. t tests and ANOVAs are only used to analyze experiments.

Answer: c

Question 4: If you are comparing two independent groups, and the outcome variable is nominal, you should conduct a ______. a. Pearson’s r b. chi-square goodness of fit c. chi-square test of independence d. one-way ANOVA Answer: c Question 5: The population of Friends Homes Senior Living is spread among four living arrangements: 40% are in independent apartments; 40% are in assisted living apartments, 10% are in nursing care and 10% are in an Alzheimer’s unit. How would you obtain a stratified random sample of 200 residents that represent these different living arrangements? Answer: Obtain separate lists of residents living in independent apartments, in assisted living, in nursing care, and in Alzheimer’s unit. Randomly select, by pulling names f rom a hat, using a computer program, or some other random sampling method, 80 from independent apartment list, 80 from assisted living, 20 from nursing list, and 20 from Alzheimer’s list.

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