3204c Exam 5 chapter 13 and 14

Anonymous
timer Asked: May 2nd, 2016

Question description



Question 1 2 pts

According to guidelines published by Cohen (1988), a correlation value of –0.55 would be considered:

Flag this Question


Question 2 2 pts

According to Cohen's published standards, a correlation coefficient of 0.10 is considered to represent:

Flag this Question


Question 3 2 pts

The Pearson correlation coefficient is symbolized:

Flag this Question


Question 4 2 pts

The numerical value for a correlation ranges between ________ and ________.

Flag this Question


Question 5 2 pts

Test-retest reliability is determined by:

Flag this Question


Question 6 2 pts

The Pearson correlation coefficient can be used as:

Flag this Question


Question 7 2 pts

A researcher collected data from 74 people about the number of fast–food meals eaten per week and length of commute to work in miles. Imagine the correlation was positive at 0.32. Two participants in the sample reported eating every meal out each week, totaling 21 meals each, and the shortest commute of 0.3 miles. If those two outliers were removed from the data, what might be a likely effect?

Flag this Question


Question 8 2 pts

Which of the following values of the correlation coefficient indicates the weakest relationship between two variables?

Flag this Question


Question 9 2 pts

Figure: Student-Faculty Ratio

Reference: Figure 1


(Figure: Student–Faculty Ratio) The relation depicted in the scatterplot is potentially deceptive because of:

Flag this Question


Question 10 2 pts

Suppose a researcher discovers that length of time spent following a Mediterranean diet is negatively correlated with risk of developing cancer. Which of the statements logically follows from this information?

Flag this Question


Question 11 2 pts

The denominator (bottom half) of the Pearson's correlation coefficient includes:

Flag this Question


Question 12 2 pts

In an investigation of the psychometric properties of the Criminal Sentiments Scale (CSS), Witte et al. (2006) administered the scale to 72 sex offenders. They found that scores on the scale correlated positively with recidivism for nonsexual crimes, but not for sexual crimes. This research suggests that:

Flag this Question


Question 13 2 pts

A correlation is computed using data from 18 people. What is the critical cutoff for a two-tailed hypothesis test with a p level of 0.05?

Flag this Question


Question 14 2 pts

A coefficient alpha of ________ is considered a minimally acceptable level of reliability for measures that will be used to make decisions about individuals based on their scores on the measure.

Flag this Question


Question 15 2 pts

Psychometrics, an in-demand career, is a branch of statistics used in:

Flag this Question


Question 16 2 pts

The three main characteristics of the correlation coefficient include all of the following except:

Flag this Question


Question 17 2 pts

What is the research hypothesis when testing for significance using the Pearson correlation coefficient?


Flag this Question

Question 18 2 pts

When a positive relation exists between two variables, what will be true in the calculation of the Pearson correlation coefficient?

Flag this Question


Question 19 2 pts

Which of the following is the strongest correlation?

Flag this Question


Question 20 2 pts

What is the relationship between correlation and causation?

Flag this Question


Question 21 2 pts

What kind of correlation would you expect to find between levels of family income and household spending on consumer goods?

Flag this Question


Question 22 2 pts

The ________ quantifies the relationship between two variables.

Flag this Question


Question 23 2 pts

Calculating the degree to which two variables are related, with a correlation, requires that those variables are measured:

Flag this Question


Question 24 2 pts

When the Pearson correlation coefficient is computed on sample data, it is symbolized by ________, and when it is computed on population data, it is symbolized by ________.

Flag this Question


Question 25 2 pts

Correlations help us look at the ________ between two variables.

Flag this Question


Question 26 2 pts

According to Cohen's published standards, a correlation coefficient of 0.49 is considered to represent:

Flag this Question


Question 27 2 pts

A correlation is computed using data from 30 people. What is the critical cutoff for a two-tailed hypothesis test with a p level of 0.05?

Flag this Question


Question 28 2 pts

Nineteen ninety-five data from over 1,000 colleges published in U.S. News & World Report were used to predict the percent of alumni who donate to a college from the average SAT score of students attending the college. The resulting regression equation was Ŷ = –29.29 + 0.05(X). Using the regression equation, what would you predict to be the percent of alumni who will donate to a college whose students' average SAT score is 1020?

Flag this Question


Question 29 2 pts

With regression we are concerned about variability around the ________, rather than variability around the ________ which would be the case in t tests or ANOVAs.

Flag this Question


Question 30 2 pts

In the equation Ŷ = 98 + 4.30(X1) + 7.20(X2), what is the slope?

Flag this Question


Question 31 2 pts

Which statistical tool allows us to predict a dependent score based on information about an independent variable?

Flag this Question


Question 32 2 pts

Regression cannot prove causation, but it can:

Flag this Question


Question 33 2 pts

A correlation of 0.38 is observed between an X variable (M = 5.8, SD = 1.07) and a Y variable (M = 2.2, SD = 0.68). If someone has a z score of 1.0 on the X variable, what would you predict as their Y score?

Flag this Question


Question 34 2 pts

Under what circumstance, unlikely as it might be, would the standard error of estimate be zero?


Flag this Question

Question 35 2 pts

The statistical analysis that allows us to use one scale variable to predict outcome on a second scale variable is called:

Flag this Question


Question 36 2 pts

A high standard error of the estimate indicates that the:

Flag this Question


Question 37 2 pts

The standardized regression coefficient expresses the:

Flag this Question


Question 38 2 pts

Once we have an equation for a straight line through our data, we can:

Flag this Question


Question 39 2 pts

The predictions made by a regression analysis are ________ in nature.

Flag this Question


Question 40 2 pts

In addition to capturing the direction and strength of a co-relation between variables, the correlation coefficient can be used to:

Flag this Question


Question 41 2 pts

The predicted score for the dependent variable will always be ________ the individual's score for the independent variable.

Flag this Question


Question 42 2 pts

The tendency of scores that are particularly high or low to drift toward the mean over time is called:

Flag this Question


Question 43 2 pts

The tendency for very tall parents to have children who are somewhat short illustrates the phenomenon:

Flag this Question


Question 44 2 pts

Which of the following formulas is the correct one for the proportion reduction in error?

Flag this Question


Question 45 2 pts

In the equation Ŷ = 130 + 5(X1) + 3(X2), which of the following statements is true?

Flag this Question


Question 46 2 pts

In the equation Ŷ = 130 + 5(X1) + 3(X2), what is the y intercept?

Flag this Question


Question 47 2 pts

Nineteen ninety-five data from over 1,000 colleges published in U.S. News & World Report were used to predict the percent of alumni who donate to a college from the average SAT score of students attending the college. The resulting regression equation was Ŷ = –29.29 + 0.05(X). This regression indicates that:

Flag this Question


Question 48 2 pts

A correlation of 0.38 is observed between an X variable (M = 5.8, SD = 1.07) and a Y variable (M = 2.2, SD = 0.68). If Ann has a z score of 1.5 on the X variable, what is her raw score for X?

Flag this Question


Question 49 2 pts

The standardized regression coefficient is often called a:

Flag this Question


Question 50 2 pts

If we do not know the regression equation and don't have the ability to generate one, the best predictor of any Yscore based on a given X score is:

Flag this Question


Question 51 2 pts

We can examine a graph to get a sense of how much error there is in a regression equation. Which of the following describes a graph that reveals there will be a high amount of error when using our regression equation?

Flag this Question


Question 52 2 pts

A researcher calculates a standardized regression coefficient on data from 52 events and computes β as 0.274. Assuming a two-tailed hypothesis test of the relation between these two variables is being conducted with an alpha of 0.05, what are the critical cutoffs?

Flag this Question


Question 53 2 pts

Identify the formula for predicting an individual's score on the dependent variable from the score on the independent variable using the correlation coefficient.

Flag this Question


Question 54 2 pts

If we have information about the slope of the line of best fit that corresponds to two sets of data about class grades for different instructors, we cannot make comparisons based on these slopes because:

Flag this Question


Question 55 2 pts

A researcher calculates a standardized regression coefficient on data from 30 events and computes β as 0.19. Assuming a two-tailed hypothesis test of the relation between these two variables is being conducted with an alpha of 0.05, what are the critical cutoffs?


Tutor Answer

(Top Tutor) Studypool Tutor
School: University of Maryland
Studypool has helped 1,244,100 students
flag Report DMCA
Similar Questions
Hot Questions
Related Tags

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors