Stat Test
Stat Concept
Anything goes
100
Coco has one question to measure participants’ attitude towards Coca-cola and another question to measure their attitude towards Pepsi. She used a 7-point scale ranging from “extremely like” to “extremely dislike.” After data collection, she would like to test the correlation between people’s attitude towards Coca-cola and Pepsi, what test should she use?
(A).Chi-square (B).Univariate t-test (C). Pearson r (D). Spearman r (E). Inferential
(C). Pearson r
100
A research participants dropping out of the study is an example of what type of threat to internal validity?
(A).Maturation (B).Selection (C).Mortality (D).History
(C).Mortality
100
Only ________ sampling allows you to make valid generalizations about the population from which the sample was drawn.
(A). Random (B). Judgment (C).Nonrandom (D). Snowball (E).quota
(A). Random
200
Coco asks participants to rank their preference among 5 soda brands in one question and asks them to rank the frequency of eating fast food in another question. After collecting data, she would like to know whether preferences for soda brands is correlated with frequency of eating fast food. What test should she use?
(A).Chi-square (B).Univariate t-test (C). Pearson r (D). Spearman r (E). Inferential
(D). Spearman r
200
What is the best estimate of the correlation shown in the graph?
(A) -.7 (B)-.05 (C) 0 (D) +.05 (E)+.7
(A) -.7
200
______ ethical framework care more about the welfare of the society; _____ ethical framework care more about the welfare of the individual.
A. Deontology, teleology
B.Teleology, deontology
C. Utilitarian, teleological
D. Sociological, teleology
B.Teleology, deontology
300
Imagine that you are conducting an A-B test for your client’s website. You are going to recruit 200 participants and half of the participants will use version A of the website that has a social share button at the end of the page, the other half of participants will use version B of the website that does not have the social share button on the page. After they use the website for about 10 minutes, you give them a survey to measure their attitude to the websites. What statistical test is appropriate for determining whether one version of the website is better than the other?
(A). Independent samples t-test (B).Paired samples t-test (C).Univariate t-test (D). Univariate z-test (E). Chi-square test
(A). Independent samples t-test
300
What is the alternative (two-tailed) hypothesis for an independent samples t-test?
(A).group one mean ≠ group two mean
(B).time one mean = time two mean
(C).sample mean ≠ population mean
(D).sample mean = population mean
(A).group one mean ≠ group two mean
300
What are the three components of the tripartite model of attitudes?
A. Affective, motivational, behavioral
B. Affective, cognitive, behavioral
C. Cognitive, motivational, affective
D. Cognitive, motivational, behavioral
B. Affective, cognitive, behavioral
400
Imagine that you are conducting a memory test for a Mr. Clean Super Bowl advertisement. You first measure 100 participants’ memory 1 week after the super bowl, then you measure the same 100 participants’ memory 1 month after the super bowl. You would like to compare whether their memory for the Super Bowl ad significantly differed across time (1 week later vs. 1 month later). What statistical test is appropriate to use in this scenario?
(A). Independent samples t-test (B). Paired samples t-test (C). Univariate t-test (D).Univariate z-test (E). Chi-square test
(B). Paired samples t-test
400
The diagram below illustrates what type of experimental design?
A. quasi-experimental: two group post-test only
B. quasi-experimental: two group post-test with control
C. experimental: two group post-test only
D. experimental: two group simulated pretest to post-test
B. quasi-experimental: two group post-test with control
400
What test would you use to find out if the observed frequency of a given phenomenon is significantly different from the expected frequency?
(A).Chi-square (B).Univariate t-test (C).Pearson r (D).Spearman r (E). Inferential
(A).Chi-square
500
Image that the soda industry (which contains less than 30 companies, including Coca-Cola, Pepsi, Fenta, etc.) sold an average of $35 billion products each year across the last 10 years. This year they sold an average of $35.08 billion products and they would like to know whether this year’s average is significantly different from the past record. What statistical test is appropriate to use in this scenario?
(A). Independent samples t-test (B). Paired samples t-test (C). Univariate t-test (D).Univariate z-test (E). Chi-square test
(C). Univariate t-test
500
Suppose an experiment shows a non-significant effect of spending behavior on extraversion. Now suppose five new studies found a significant effect, such that spenders tend to be more extroverted than savers. The first study was most likely:
(A). Type I error (B).Type II error (C).a testing effect
(D). a factorial design
(B).Type II error
500
Which level(s) of measurement can be used for "determining differences between mean scores"?
A. ratio only
B. interval and ratio
C. ordinal, interval, and ratio
D.all four levels: nominal, ordinal, interval, and ratio
B. interval and ratio