Identifying Statistical Tests (A)
A researcher, using previously collected data, wants to predict the number of days an offender will remain in the community depending on the number of substance abuse classes they attended while incarcerated.
Linear Regression
A researcher wants to determine if college students who studied abroad experienced significantly more sexual assaults than college students who did not study abroad
Independent Samples T-Test
Explain in what situation we would use a Pearson Product Moment Correlation
When examining the relationship between two continuous variables
Explain in what situation we would use a One-Sample Chi-Square
When the data are categorical and we are examining differences in frequencies
Who is the creator of the One-Sample Chi-Square Test
A researcher was interested in determining if there were differences in the number of robberies based on the type of area: suburban or urban. The researcher compared the mean number of robberies in the past 6 months for 15 urban areas and 15 suburban areas.
Independent Samples T-TEST
The Department of Health and Human Services wants to know if the mean number of mental health-related arrests in Boston is significantly different from the mean number of mental health-related arrests for all in the state of Massachusetts.
One Sample Z-Test
Identify the obtained value from the following Excel Output
r = 0.7071
Identify the obtained value from the following Excel Output
OV = 17.96
What are the three requirements for a causal relationship?
1) Statistical Correlation (Relationship)
2) Temporal Order
3) Lack of Spuriousness
A researcher is interested in assessing the relationship between average community police satisfaction scores and the assault rate within a sample of communities
A researcher wants to examine the frequency with which the police are called to the Stoney Creek Brewery, Thimble Island Brewery, and the Brewport Brewing Company
One-Sample Chi-Square
Using the correlation table, identify the correct critical value for the provided Excel Output.
CV = 0.2732
Using the Chi-Square table, identify the correct critical value for the provided Excel Output.
CV = 9.49
The Coefficient of Determination (r2)
A researcher from the University of New Haven is interested in determining if there is a significant difference in the frequency with which freshmen, sophomores, juniors, and seniors violate the COVID-19 policies on campus.
One-Sample Chi-Square
Tourism contributes significantly to each Maine county’s annual budget, and a researcher employed by Knox County is interested in comparing their mean annual tourist revenue to the mean for all Maine counties.
One-Sample Z-Test
Using the provided Excel output, write the test string that would appear at the end of a hypothesis test write-up.
r(50) = 0.7071, p < 0.05
Using the provided Excel output, write the test string that would appear at the end of a hypothesis test write-up.
χ2(4) = 17.96, p < 0.05
Fill in the Blank: Statistical tests that make assumptions about the distribution of scores are known as _______ tests.
Parametric Tests
The director of the Michigan Department of Corrections wants to determine if Crisis Response Teams reduced the number of opioid-related inmate deaths. To test this question, a researcher compares the number of opioid-related deaths two years before and two years after the creation of the Crisis Response Teams.
Dependent Samples T-Test
A researcher wants to use observed scores on the Drivers Education Safety Exam to predict the number of speeding tickets a Drivers Ed. Completer will likely receive in the next year.
Calculate and interpret the Coefficient of Determination using the provided Excel Output
CoD = 0.50
Relationship magnitude = Moderate
50% of the variability in Variable Two is explained by Variable One
Utilizing the provided standardized residuals, identify which towns are considered significant
Friendship
Fill in the Blank: The One-Sample Chi-Square requires a post-hoc test when significant because this test is considered an _______.
Omnibus Test