Week 1 Quiz
Graded Quiz • 30 min Quiz09 Questions Week 1
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Week 1 Quiz

Graded Quiz • 30 min Quiz09 Questions Week 1
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Q:

Consider the table below describing a data set of individuals who have registered to volunteer at a public school. Which of the following is a discrete numerical variable?

Q:

The General Social Survey conducted annually in the United States asks how many friends people have and how they would rate their happiness level (very happy, pretty happy, not too happy). In order to evaluate the relationship between these two variables a researcher calculates the average number of friends for people who categorize themselves as very happy, pretty happy, and not too happy. Which of the following correctly identifies the variables used in the study as explanatory and response?

Q:

In an experiment, what purpose does blocking serve?

Q:

Which of the following is one of the four principles of experimental design?

Q:

As part of a statistics project, Andrea would like to collect data on household size in her city. To do so, she asks each person in her statistics class for the size of their household, and reports that her sample is a simple random sample. However, this is not a simple random sample. Which of the following is the best reasoning for why this is not a random sample that is appropriate for this research question?

Q:

Which of the following is one of the four principles of experimental design?

Q:

Past research suggests that students who study with fewer distractions (internet, cell phone, etc.) tend to get higher grades. Which of the following is the best scenario for being able to generalize this finding to the population of all students?

Q:

A school district is considering whether it will no longer allow students to park at school after two recent accidents where students were severely injured. As a first step, they survey parents of high school students by mail, asking them whether or not the parents would object to this policy change. Of 5,799 surveys that go out, 1,209 are returned. Of these 1,209 surveys that were completed, 926 agreed with the policy change and 283 disagreed. Which of the following statements is the most plausible?

Q:

Which of the following is not one of the four principles of experimental design?

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