Questions from Business Statistics

Q: The correlation between Fuel Efficiency (as measured by miles per gallon

The correlation between Fuel Efficiency (as measured by miles per gallon) and Price of 150 cars at a large dealership is r=0.34. Explain whether or not each of these possible conclusions is justified:...

Q: Exercise 24 describes an experiment showing that exercise helped people sleep better

Exercise 24 describes an experiment showing that exercise helped people sleep better. The experiment involved other groups of subjects who didn’t exercise. Why didn’t the experimenters just have every...

Q: Exercises 21 and 35 describe an experiment investigating a dietary approach to

Exercises 21 and 35 describe an experiment investigating a dietary approach to treating bipolar disorder. Researchers randomly assigned 30 subjects to two treatment groups, one group taking a high dos...

Q: Exercises 24 and 36 describe an experiment investigating the effectiveness of exercise

Exercises 24 and 36 describe an experiment investigating the effectiveness of exercise in combating insomnia. Researchers randomly assigned half of the 40 volunteers to an exercise program. 1. Why was...

Q: Exercises 21, 35, and 37 describe an experiment investigating the

Exercises 21, 35, and 37 describe an experiment investigating the effectiveness of omega-3 fats in treating bipolar disorder. Suppose some of the 30 subjects were very active people who walked a lot o...

Q: Exercises 24, 36, and 38 describe an experiment investigating the

Exercises 24, 36, and 38 describe an experiment investigating the effectiveness of exercise in combating insomnia. Suppose some of the 40 subjects had maintained a healthy weight, but others were quit...

Q: Exercise 33 describes an experiment that studies hamstring injuries. Describe a

Exercise 33 describes an experiment that studies hamstring injuries. Describe a strategy to randomly assign injured athletes to the two exercise programs. What should be done if one of the athletes sa...

Q: Describe a strategy to randomly split 24 tomato plants into the three

Describe a strategy to randomly split 24 tomato plants into the three groups for the completely randomized single-factor experiment of Exercise 4.

Q: A running-shoe manufacturer wants to test the effect of its

A running-shoe manufacturer wants to test the effect of its new sprinting shoe on 100-meter dash times. The company sponsors 5 athletes who are running the 100-meter dash in the 2012 Summer Olympic ga...

Q: Exercise 33 discussed an experiment to see if the time it took

Exercise 33 discussed an experiment to see if the time it took athletes with hamstring injuries to be able to return to sports was different depending on which of two exercise programs they engaged in...