The presidential election campaign is in full swing, and the candidates have hired polling organizations to take regular polls to find out what the voters think about the issues. What does the standard of informed consent require the polling organizations to tell potential respondents?

The presidential election campaign is in full swing, and the candidates have hired polling organizations to take regular polls to find out what the voters think about the issues. What does the standard of informed consent require the polling organizations to tell potential respondents?

(A) The achievements of the candidate or the political party
(B) Which candidate the pollster personally supports and why
(C) The election process and date of election
(D) The kind of questions they will be asked and the approximate amount of time required to complete the survey


Answer: (D) The kind of questions they will be asked and the approximate amount of time required to complete the survey

A local newspaper in the State of Connecticut conducts a poll on whether the people of the state believe the "No Child Left Behind" law is effective. The newspaper contacts 1000 subscribers. The population of this poll is:

A local newspaper in the State of Connecticut conducts a poll on whether the people of the state believe the "No Child Left Behind" law is effective. The newspaper contacts 1000 subscribers. The population of this poll is:

(A) The 1000 people surveyed
(B) Those who favor or disapprove of the "No Child Left Behind" law
(C) People who live in the State of Connecticut
(D) Those who are affected by "No Child Left Behind"


Answer: (C) People who live in the State of Connecticut

The sampling variability of a statistic reflects

The sampling variability of a statistic reflects

(A) the difference in the value of a statistic across repeated samples
(B) the error due to a voluntary response sample
(C) the difference in responses with a single sample
(D) the difference between the statistic and the true parameter


Answer: (A) the difference in the value of a statistic across repeated samples

A manufacturer of chisels is interested in determining how the angle at which the cutting edge is sharpened affects tool abrasion. To answer this question, engineers obtain 20 similar chisels. They sharpen five chisels at each of 22.5, 25, 27.5, and 30 degrees. Then, they measure the amount of abrasion (rated on a scale of 1 to 10, with 10 being the worst) after cutting several mortises (square holes) in 3/4-inch hard maple boards. Which of the following is the explanatory variable in the given study?

A manufacturer of chisels is interested in determining how the angle at which the cutting edge is sharpened affects tool abrasion. To answer this question, engineers obtain 20 similar chisels. They sharpen five chisels at each of 22.5, 25, 27.5, and 30 degrees. Then, they measure the amount of abrasion (rated on a scale of 1 to 10, with 10 being the worst) after cutting several mortises (square holes) in 3/4-inch hard maple boards. Which of the following is the explanatory variable in the given study?

(A) Mortises
(B) Tool abrasion
(C) Angle of cutting edge
(D) Sharpening of chisels


Answer: (C) Angle of cutting edge