Questions from Business Statistics

Q: You are assigned to be part of a group of three students

You are assigned to be part of a group of three students from the intro stats class described in Exercise 28. What is the probability that of your other two groupmates, 1. neither has studied calculus...

Q: You used the Multiplication Rule to calculate repair probabilities for your cars

You used the Multiplication Rule to calculate repair probabilities for your cars in Exercise 29. 1. What must be true about your cars in order to make that approach valid? 2. Do you think this assumpt...

Q: You used the Multiplication Rule to calculate probabilities about the calculus background

You used the Multiplication Rule to calculate probabilities about the calculus background of your statistics groupmates in Exercise 30. 1. What must be true about the groups in order to make that appr...

Q: A Gallup Poll (www.gallup.com/poll/

A Gallup Poll (www.gallup.com/poll/161729/americans-divided-energy-environment-trade-off.aspx) in March 2013 asked 529 U.S. adults whether increasing oil, gas, and coal production or developing altern...

Q: A Pew Research poll in 2011 asked 2005 U.S.

A Pew Research poll in 2011 asked 2005 U.S. adults whether being a father today is harder than it was a generation ago. Here how they responded: If we select a respondent at random from this sample of...

Q: Here are engine size (displacement, in liters) and gas

Here are engine size (displacement, in liters) and gas mileage (estimated combined city and highway) for a random sample of 35 2016 model cars (taken from Fuel economy 2016 and identified in the data...

Q: Exercise 33 shows the results of a Gallup Poll about energy.

Exercise 33 shows the results of a Gallup Poll about energy. Suppose we select three people at random from this sample. 1. What is the probability that all three responded Develop wind and solar? 2. W...

Q: Consider again the results of the poll about fathering discussed in Exercise

Consider again the results of the poll about fathering discussed in Exercise 34. If we select two people at random from this sample, 1. what is the probability that both think that being a father is e...

Q: As mentioned in the chapter, opinion-polling organizations contact their

As mentioned in the chapter, opinion-polling organizations contact their respondents by sampling random telephone numbers. Although interviewers can reach about 62% of U.S. households, the percentage...

Q: According to Pew Research, the contact rate (probability of contacting

According to Pew Research, the contact rate (probability of contacting a selected household) was 90% in 1997 and 62% in 2012. However, the cooperation rate (probability of someone at the contacted hou...