Questions from Statistics Principles

Q: Clayton Kershaw of the Los Angeles Dodgers is one of the premier

Clayton Kershaw of the Los Angeles Dodgers is one of the premier pitchers in baseball. His most popular pitch is a four-seam fastball. The data below represent the pitch speed (in miles per hour) for...

Q: Research the sampling methods used by a market research firm in your

Research the sampling methods used by a market research firm in your neighborhood. Report your findings to the class. The report should include the types of sampling methods used, number of stages, an...

Q: Harris Interactive conducted a poll of a random sample of 2234 adult

Harris Interactive conducted a poll of a random sample of 2234 adult Americans 18 years of age or older and asked, “Which is more annoying to you, tailgaters or slow drivers who stay in the passing la...

Q: Sleep apnea is a disorder in which you have one or more

Sleep apnea is a disorder in which you have one or more pauses in breathing or shallow breaths while you sleep. In a cross-sectional study of 320 individuals who suffer from sleep apnea, it was found...

Q: The following data represent the property tax for a random sample of

The following data represent the property tax for a random sample of 50 single-family homes in the city of Houston. Suppose you want to estimate the typical property real estate tax for a single-famil...

Q: Go to www.pearsonhighered.com/ sullivanstats to obtain the

Go to www.pearsonhighered.com/ sullivanstats to obtain the data file 9_4_21. The data represent the status of licenses for short-term rentals in New Orleans, where “Yes” indicates the license is expir...

Q: Researchers conducted a study to see the effect of specific lifestyle and

Researchers conducted a study to see the effect of specific lifestyle and dietary changes for preventing long-term weight gain. The study involved the consolidation of three cohorts from the Nurses’ H...

Q: A developmental mathematics instructor wishes to estimate the typical amount of time

A developmental mathematics instructor wishes to estimate the typical amount of time students dedicate to studying mathematics in a week. She asks a random sample of 50 students enrolled in developmen...

Q: Researchers at the Gallup Organization asked a random sample of 1016 adult

Researchers at the Gallup Organization asked a random sample of 1016 adult Americans aged 21 years or older, “Right now, do you think the state of moral values in the country as a whole is getting bet...

Q: A researcher wanted to know whether consumption of green tea on a

A researcher wanted to know whether consumption of green tea on a daily basis reduces LDL (bad) cholesterol. She obtains a random sample of 500 subjects. Each subject consumes at least 1 cup of green...