Questions from Essentials of Statistics

Q: In the article “Are Christian/Religious People Poor Tippers?”

In the article “Are Christian/Religious People Poor Tippers?” (Journal of Applied Social Psychology, Vol. 43, Issue 5, pp. 928–935), M. Lynn and B. Katz report that, for customers who receive bad serv...

Q: A sample of fifth-grade classes was studied in the journal

A sample of fifth-grade classes was studied in the journal article “Predicting Feelings of School Safety for Lower, Middle, and Upper School Students” (Applied Psychology in Criminal Justice, Vol. 7,...

Q: In a designed experiment, there are two factors, say,

In a designed experiment, there are two factors, say, Factor A and Factor B. Factor A has four levels, say, a1, a2, a3, and a4; Factor B has two levels, say, b1 and b2. a. Construct a schematic for th...

Q: The rare booted eagle of western Europe was the focus of a

The rare booted eagle of western Europe was the focus of a study by S. Suarez et al. to identify optimal nesting habitat for this raptor. According to their paper “Nesting Habitat Selection by Booted...

Q: Desert Samaritan Hospital in Mesa, Arizona, keeps records of emergency

Desert Samaritan Hospital in Mesa, Arizona, keeps records of emergency room traffic. Those records reveal that the times between arriving patients have a mean of 8.7 minutes with a standard deviation...

Q: Let 0 <α< 1. For a normally distributed variable

Let 0

Q: Express the quartiles, Q1, Q2, and Q3, of

Express the quartiles, Q1, Q2, and Q3, of a normally distributed variable in terms of its mean, μ, and standard deviation, σ.

Q: Express the kth percentile, Pk, of a normally distributed variable

Express the kth percentile, Pk, of a normally distributed variable in terms of its mean, μ, and standard deviation, σ.

Q: Under what circumstances is using a normal probability plot to assess the

Under what circumstances is using a normal probability plot to assess the normality of a variable usually better than using a histogram, stem-and-leaf diagram, or dotplot?

Q: Explain why assessing the normality of a variable is often important.

Explain why assessing the normality of a variable is often important.