MULTIPLE CHOICE QUESTIONS Question 1 Cross-sectional data are data: A. collected

Question

MULTIPLE CHOICE QUESTIONS
Question 1
Cross-sectional data are data:



A. collected over time


B. that are collected over a single period of time


C. consisting of a single variable


D. consisting of two or more variables

Question 2
Ordinal data are:



A. sorted into categories according to specified characteristics


B. ordered or ranked according to some relationship to one another


C. ordered, have a specified measure of a distance between observations but have no nature zero


D. data which have a natural zero
Question 3

The process of collection, organization, and description of data is commonly called:
A. descriptive statistics

B. statistical inference

C. predictive statistics

D. operational statistics
Question 4
__________ is a measure of a linear relationship between two variables, X and Y.



A. correlation


B. range


C. standard deviation


D. median

Question 5
The statistical measures that characterize dispersion are:



A. Range, variance, standard deviation


B. Mean, median, mode


C. Range, mean, standard deviation


D. Correlation, frequencies, standard deviation


Question 9
A confidence interval (CI) is a range of scores with specific boundaries that
should contain the ______ mean.



A. sample


B. population


C. standard error


D. none of the above



Question
The hypothesis predicting that differences exist between the groups being compared is to the hypothesis predicting that no differences exist between the groups being compared as _____ hypothesis is to _____ hypothesis.



A. null; alternative


B. alternative; null


C. one-tailed; two-tailed


D. two-tailed; one tailed


Question 12
Directional hypothesis is to non-directional hypothesis as _____ hypothesis is to _____ hypothesis.



A. null; alternative


B. alternative; null


C. one-tailed; two-tailed


D. two-tailed; one-tailed

Question 13
A researcher was interested in the emotional effects of music on exam performance. Before their exam, a professor took one group of students into a room in which calming music was played. A different group of students were taken to another room in which new wave hard rock was being played. The students then took the exam and their scores were reported. What type of analysis would be most appropriate?



A. Paired (dependent) t-test


B. Independent (unpaired) t-test


C. Analysis of Variance ANOVA


D. Repeated Measures ANOVA

Question 14
As the value of a t-test _____, the sample variance _____.



A. increases; decreases


B. decreases; increases


C. increases; increases


D. decreases; decreases


Question 15
_____ is a procedure which allows us to predict an individual’s score on one
variable based on knowing one or more other variables.



A. Pearson product-moment correlation coefficient


B. Coefficient of determination


C. Regression analyses


D. Point-biserial correlation coefficient

Question 16
A fashion student was interested in factors that predicted the salaries of catwalk models. She collected data from 231 models. For each model she asked them their salary per day on days when they were working (salary), their age (age), how many years they had worked as a model (years), and then got a panel of experts from modeling agencies to rate the attractiveness of each model as a percentage with 100% being perfectly attractive (beauty). The most appropriate statistical analysis would be:



A. T-test


B. ANOVA


C. Multiple-regression


D. chi square

Question 17
The _____ is the best fitting straight-line drawn through the center of a scatterplot that indicates the relationship between the variables.



A. regression line


B. negative relationship


C. measure of variation


D. multiple-baseline

Explanation / Answer

B. that are collected over a single period of time B. ordered or ranked according to some relationship to one another B. statistical inference B. range A. Range, variance, standard deviation

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