Questions from Essentials of Statistics

Q: The report Controlling Road Rage: A Literature Review and Pilot Study

The report Controlling Road Rage: A Literature Review and Pilot Study was prepared for the AAA Foundation for Traffic Safety by D. Rathbone and J. Huckabee. The authors discussed the results of a lite...

Q: Observing that the proportion of blue M&Ms in his bowl

Observing that the proportion of blue M&Ms in his bowl of candy appeared to be less than that of the other colors, R. Fricker, Jr., decided to compare the color distribution in randomly chosen bags of...

Q: An American roulette wheel contains 18 red numbers, 18 black numbers

An American roulette wheel contains 18 red numbers, 18 black numbers, and 2 green numbers. The following table shows the frequency with which the ball landed on each color in 200 trials. At the 5% sig...

Q: A gambler thinks a die may be loaded, that is,

A gambler thinks a die may be loaded, that is, that the six numbers are not equally likely. To test his suspicion, he rolled the die 150 times and obtained the data shown in the following table. Do th...

Q: Drunk-driving fatalities represent the total number of people (occupants

Drunk-driving fatalities represent the total number of people (occupants and non-occupants) killed in motor vehicle traffic crashes in which at least one driver had a blood alcohol content (BAC) of 0....

Q: Consider two χ2-curves with degrees of freedom 12 and 20

Consider two χ2-curves with degrees of freedom 12 and 20, respectively. Which one more closely resembles a normal curve? Explain your answer.

Q: A project exploring the bottled-water phenomenon and preference of water

A project exploring the bottled-water phenomenon and preference of water types was conducted by researchers M. Lunsford and A. Fink in the article “Water Taste Test Data” (Journal of Statistics Educat...

Q: The World Series in baseball is won by the first team to

The World Series in baseball is won by the first team to win four games (ignoring the 1903 and 1919–1921 World Series, when it was a best of nine). Thus it takes at least four games and no more than s...

Q: Arabidopsis is a genus of flowering plant related to cabbage. A

Arabidopsis is a genus of flowering plant related to cabbage. A variegated mutant of the Arabidopsis has yellow streaks or marks. E. Miura et al. studied the origin of this variegated mutant in the ar...

Q: One probability model for child gender is that a boy or a

One probability model for child gender is that a boy or a girl is equally likely to be born. If that model is correct, then, for a two-child family, the probabilities are 0.25, 0.50, and 0.25 of two g...