Questions from Business Statistics


Q: A portion of a data set containing information for 45 mutual funds

A portion of a data set containing information for 45 mutual funds that are part of the Morningstar Funds 500 follows. The complete data set is available in the file named MutualFunds. The data set in...

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Q: For the holiday season of 2017, nearly 59 percent of consumers

For the holiday season of 2017, nearly 59 percent of consumers planned to buy gift cards. According to the National Retail Federation, millennials like to purchase gift cards (Dayton Daily News websit...

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Q: A sample containing years to maturity and yield (%) CorporateBonds for 40

A sample containing years to maturity and yield (%) CorporateBonds for 40 corporate bonds is contained in the file CorporateBonds (Barron’s). a. Develop a scatter diagram of the data using x = years t...

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Q: Consumer Reports tested 19 different brands and models of road, fitness

Consumer Reports tested 19 different brands and models of road, fitness, and comfort bikes. Road bikes are designed for long road trips; fitness bikes are designed for regular workouts or daily commut...

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Q: In baseball, an earned run is any run the opposing team

In baseball, an earned run is any run the opposing team scores off a pitcher except for a run scored as a result of fielding errors. The earned run average (ERA) is a statistic commonly used to compar...

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Q: A study investigated the relationship between audit delay (Delay), the

A study investigated the relationship between audit delay (Delay), the length of time from a company’s fiscal year-end to the date of the auditor’s report, and vari...

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Q: Refer to the data in exercise 31. Consider a model in

Refer to the data in exercise 31. Consider a model in which only Industry is used to predict Delay. At a .01 level of significance, test for any positive autocorrelation in the data. Exercise 31: In...

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Q: Refer to the data in exercise 31. a. Develop

Refer to the data in exercise 31. a. Develop an estimated regression equation that can be used to predict Delay by using Industry and Quality. b. Plot the residuals obtained from the estimated regres...

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Q: The U.S. Department of Energy’s Fuel Economy Guide provides

The U.S. Department of Energy’s Fuel Economy Guide provides fuel efficiency data for cars and trucks (www.fueleconomy.gov). The file FuelEconomy2019 provides a portion of the data for 387 vehicles fro...

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Q: According to the IRS, individuals filing federal income tax returns prior

According to the IRS, individuals filing federal income tax returns prior to March 31 received an average refund of $1056 in 2018. Consider the population of “last-minute” filers who mail their tax re...

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