SOLUTION: Question 1
Select one answer.
10 points
In order to study whether IQ level is related to birth order, data were collected from a sample of 540 students on their birth order (Ol
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-> SOLUTION: Question 1
Select one answer.
10 points
In order to study whether IQ level is related to birth order, data were collected from a sample of 540 students on their birth order (Ol
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Question 1049218: Question 1
Select one answer.
10 points
In order to study whether IQ level is related to birth order, data were collected from a sample of 540 students on their birth order (Oldest/In Between/Youngest) and their score on an IQ test.
Which of the following would be a meaningful display of the data from this study?
Side-by-side boxplots
A pie chart
A scatterplot
A histogram
A two-way table
Question 2
Select one answer.
10 points
A store asked 250 of its customers whether or not they were satisfied with the service. The responses were also classified according to the gender of the customers. We want to study whether there is a relationship between satisfaction and gender.
Which of the following would be a meaningful display of the data from this study?
A pie chart
Side-by-side boxplots
A histogram
A scatterplot
A two-way table
Question 3
Select one answer.
10 points
A local ice cream shop kept track of the number of cans of cold soda it sold each day, and the temperature that day, for 2 months during the summer. The data are displayed in the scatterplot below: Which of the following is the best description of the relationship between X and Y as it appears in the scatterplot?
Positive linear relationship with outlier(s)
Positive linear relationship with no outlier(s)
Positive nonlinear relationship with outlier(s)
Negative linear relationship with no outlier(s)
Negative nonlinear relationship with outlier(s)
Negative nonlinear relationship with no outlier(s)
Question 5
Select one answer.
10 points
A researcher wants to determine if preschool attendance is associated with high school graduation for low-income students. She randomly assigns low-income children to two groups; one group will attend preschool program, the second group will not attend preschool. The researcher plans to follow the children in the study for 20 years and observe whether or not they graduate from high school.
Which of the following is the response variable in this study?
The income status of the children
The length of time it takes a subject to graduate high school
Whether or not a subject graduates high school
Whether or not a subject attends preschool
Question 6
Select one answer.
10 points
A study seeks to answer the question, Does Vitamin C level in the breast milk of new mothers reduce the risk of allergies in their breastfed infants? The study concluded that high levels of vitamin C (measured in mg) were associated with a 30 percent lower risk of allergies in the infants.
In this scenario, levels of vitamin C (measured in milligrams) is what type of variable?
Categorical
Quantitative
