Questions from Statistics Principles

Q: Researchers wanted to assess the effect of low alcohol consumption on reaction

Researchers wanted to assess the effect of low alcohol consumption on reaction time in seniors, believing that even low levels of alcohol consumption can impair the ability to walk, thereby increasing...

Q: A common tip for taking multiple-choice tests is to always

A common tip for taking multiple-choice tests is to always pick (b) or (c) if you are unsure. The idea is that instructors tend to feel the answer is more hidden if it is surrounded by distractor answ...

Q: A marketing research firm wants to know whether information presented in a

A marketing research firm wants to know whether information presented in a commercial is better recalled when presented using humor or serious commentary by adults between 18 and 35 years of age. They...

Q: Describe what is meant by a matched-pairs design. Contrast

Describe what is meant by a matched-pairs design. Contrast this experimental design with a completely randomized design.

Q: Go to an online science magazine such as Science Daily (www

Go to an online science magazine such as Science Daily (www.sciencedaily.com) or an open source online medical journal such as BioMed Central (www.biomedcentral.com) and identify an article that inclu...

Q: Many newspaper articles discuss the dangers of teens texting while driving.

Many newspaper articles discuss the dangers of teens texting while driving. Suppose you are a journalist and want to chime in on the discussion. However, you want your article to be more compelling, s...

Q: What is the role of randomization in a designed experiment? If

What is the role of randomization in a designed experiment? If you were conducting a completely randomized design with four treatments and 100 experimental units, describe how you would randomly assig...

Q: Discuss why the order of questions or choices within a questionnaire are

Discuss why the order of questions or choices within a questionnaire are important in sample surveys.

Q: Harris Interactive conducted a poll of U.S. adults and

Harris Interactive conducted a poll of U.S. adults and asked, “When there is a voiceover in a commercial, which type of voice is more likely to sell me a car?” Results of the survey are in the bar gra...

Q: The following data represent the percentage of total adjusted gross income (

The following data represent the percentage of total adjusted gross income (AGI) earned and percentage of tax paid by various income classes. The top 1% represents the percentage of total AGI earned a...