Project #161615 - Stats

Business Tutors

Subject Business
Due By (Pacific Time) 12/24/2016 12:00 am


Question 1 of 17

5.89 Points


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 of 17

5.89 Points

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 which have a natural zero


Reset Selection


Question 3 of 17

5.89 Points

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 of 17

5.89 Points


__________ is a measure of a linear relationship between two variables, X and Y.







C.standard deviation




Question 5 of 17

5.88 Points


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


Reset Selection

Question 6 of 17

5.88 Points

Define standard deviation



A.A measure of how dispersed observations around the mean


B.The square root of variance


C.The amount of variation error in the data


D.A & B above


Question 7 of 17

5.88 Points


A discrete random variable is:



A.outcomes over a continuous range of real numbers


B.a numerical description of the outcome of an experiment for which the number of possible outcomes can be counted for which the number of possible outcomes can not be counted


Question 8 of 17

5.88 Points


Two common probability distributions are ______ and _____.



A.Discrete, Continuous






D.None of the above


Question 9 of 17

5.88 Points


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







C.standard error


D.none of the above


Question 10 of 17

5.88 Points


The most common probabilistic sampling approach is:



A.simple random sampling


B.convenient sampling


C.complex sampling


D.error sampling


Reset Selection

Question 11 of 17

5.88 Points

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; two-tailed


D.two-tailed; one tailed


Question 12 of 17

5.88 Points


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



A.null; alternative


B.alternative; null; two-tailed


D.two-tailed; one-tailed


Question 13 of 17

5.88 Points


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


Reset Selection

Question 14 of 17

5.88 Points

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



A.increases; decreases


B.decreases; increases


C.increases; increases


D.decreases; decreases


E.A & B above


Question 15 of 17

5.88 Points


_____ 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


Reset Selection

Question 16 of 17

5.88 Points

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:









D.chi square


Question 17 of 17

5.88 Points


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








out of 1971 reviews

out of 766 reviews

out of 1164 reviews

out of 721 reviews

out of 1600 reviews

out of 770 reviews

out of 766 reviews

out of 680 reviews