Questions from Statistics Principles

Q: One of the most famous presidential elections (from a statistician’s point

One of the most famous presidential elections (from a statistician’s point of view) is the 1936 contest between incumbent Franklin D. Roosevelt (FDR) and Republican challenger Alf Landon. The notoriet...

Q: The waist circumference of males 20–29 years old is approximately

The waist circumference of males 20–29 years old is approximately normally distributed, with mean 92.5 cm and standard deviation 13.7 cm. Source: M. A. McDowell, C. D. Fryar, R. Hirsch, and C. L. Ogde...

Q: In the General Social Survey, individuals were asked whether civic duty

In the General Social Survey, individuals were asked whether civic duty included voting and whether it included serving on a jury. The results of the survey are shown in the table. Is there a differen...

Q: Suppose the scores earned on Professor McArthur’s third statistics exam are normally

Suppose the scores earned on Professor McArthur’s third statistics exam are normally distributed with mean 64 and standard deviation 8. Professor McArthur wants to curve the exam scores as follows: Th...

Q: What is the simple least-squares regression model? What are

What is the simple least-squares regression model? What are the requirements to perform inference on a simple least-squares regression line? How do we verify that these requirements are met?

Q: In a poll conducted by the Gallup organization, 16% of

In a poll conducted by the Gallup organization, 16% of adult, employed Americans were dissatisfied with the amount of their vacation time. You conduct a survey of 500 adult, employed Americans. (a) Ap...

Q: A biology professor wants to investigate the relation between the seat location

A biology professor wants to investigate the relation between the seat location chosen by a student on the first day of class and their cumulative grade point average (GPA). He randomly selected an in...

Q: Researchers want to know if there is a link between hypertension (

Researchers want to know if there is a link between hypertension (high blood pressure) and consumption of salt. Past studies have indicated that the consumption of fruits and vegetables offsets the ne...

Q: State the Central Limit Theorem.

State the Central Limit Theorem.

Q: The following data represent the square footage and rents for apartments in

The following data represent the square footage and rents for apartments in Queens, New York and Nassau County, New York. For this problem, only consider the Queens data. (a) What are the estimates of...