Questions from Business Statistics

Q: In another experiment to see if getting candy after a meal would

In another experiment to see if getting candy after a meal would induce customers to leave a bigger tip, a waitress randomly decided what to do with 80 dining parties. Some parties received no candy,...

Q: In August 2011, a Sodahead.com voluntary response poll asked

In August 2011, a Sodahead.com voluntary response poll asked site visitors, Obama is on Vacation Again: Does He Have the Worst Timing Ever? 56% of the 629 votes were for Yes. During the week of the po...

Q: An experiment to test a new laundry detergent, SparkleKleen, is

An experiment to test a new laundry detergent, SparkleKleen, is being conducted by a consumer advocate group. They would like to compare its performance with that of a laboratory standard detergent th...

Q: Sofie, Ryan, and Alessandra wanted to design an experiment to

Sofie, Ryan, and Alessandra wanted to design an experiment to find out how distraction affects our ability to judge time. The experiment consisted of starting a clock (out of view of the subject) and...

Q: Mary Beth, Nigel, and Molly want to design an experiment

Mary Beth, Nigel, and Molly want to design an experiment to find the recipe for the best chocolate chip cookies. They will try to keep the size of the cookies the same, but use cooking times of 10 and...

Q: A college statistics class conducted a survey concerning community attitudes about the

A college statistics class conducted a survey concerning community attitudes about the college large homecoming celebration. That survey drew its sample in the following manner: Telephone numbers were...

Q: A study examined brain size (measured as pixels counted in a

A study examined brain size (measured as pixels counted in a digitized magnetic resonance image [MRI] of a cross section of the brain) and IQ (4 performance scales of the Wechsler IQ test) for college...

Q: The table lists the amounts of rainfall (in acre-feet

The table lists the amounts of rainfall (in acre-feet) from the 26 clouds seeded with silver iodide discussed in Exercise 40. (Data in Cloud seeding) 1. Why is acre-feet a good way to measure the amou...

Q: Researchers at the Purina Pet Institute studied Labrador retrievers for evidence of

Researchers at the Purina Pet Institute studied Labrador retrievers for evidence of a relationship between diet and longevity. At 8 weeks of age, 2 puppies of the same sex and weight were randomly ass...

Q: Readers Digest (April 2002, p. 152) reported results

Readers Digest (April 2002, p. 152) reported results of several surveys that asked graduate students to examine photographs of men and women and try to guess their ages. Researchers compared these gue...