Essentials of Statistics for Business and Economics 9th Edition solutions

Essentials of Statistics for Business and Economics 9
According to Franchise Business Review, over 50% of all food\ franchises earn a profit of less than $50,000 a year. In a sample of 142 casual dining restaurants, 81 earned a profit of less than $50,000 last year. a. What is the point estimate of the proportion of casual dining restaurants that earned

Essentials of Statistics for Business and Economics 9
The Centers for Disease Control and Prevention (CDC) define a healthy sleep duration to be at least seven hours per day. The CDC reports that the percentage of people who report a healthy sleep duration varies by marital status. The CDC also reports that in 2018, 67% of those who are married report a

Essentials of Statistics for Business and Economics 9
Fortune magazines list of the worlds most admired companies for 2014 is provided in the data contained in the file AdmiredCompanies (Fortune magazine website). The data in the column labeled Return shows the one-year total return (%) for the top ranked 50 companies. For the same time period the S&P a

Essentials of Statistics for Business and Economics 9
In the spring of 2017, the Consumer Reports National Research Center conducted a survey of 1007 adults to learn about their major health-care concerns. The survey results showed that 574 of the respondents lack confidence they will be able to afford health insurance in the future. a. What is the poin

Essentials of Statistics for Business and Economics 9
Wedding Costs. The XO Group Inc. conducted a 2015 survey of 13,000 brides and grooms married in the United States and found that the average cost of a wedding is $29,858 (XO Group website). Assume that the cost of a wedding is normally distributed with a mean of $29,858 and a standard deviation of $5

Essentials of Statistics for Business and Economics 9
Based on data from the U.S. Census Bureau, a Pew Research study showed that the percentage of employed individuals ages 2529 who are college educated is at an all-time high. The study showed that the percentage of employed individuals aged 2529 with at least a bachelors degree in 2016 was 40%. In the

Essentials of Statistics for Business and Economics 9
Rocky Mountain National Park is a popular park for outdoor recreation activities in Colorado. According to U.S. National Park Service statistics, 46.7% of visitors to Rocky Mountain National Park in 2018 entered through the Beaver Meadows park entrance, 24.3% of visitors entered through the Fall Rive

Essentials of Statistics for Business and Economics 9
Discuss the differences between statistics as numerical facts and statistics as a discipline or field of study

Essentials of Statistics for Business and Economics 9
According to the Vivino website, the mean price for a bottle of red wine that scores 4.0 or higher on the Vivino Rating System is $32.48. A New Englandbased lifestyle magazine wants to determine if red wines of the same quality are less expensive in Providence, and it has collected prices for 56 rand

Essentials of Statistics for Business and Economics 9
A sample containing years to maturity and yield for 40 corporate bonds are contained in the file CorporateBonds. a. What is the sample mean years to maturity for corporate bonds and what is the sample standard deviation? b. Develop a 95% confidence interval for the population mean years to maturity.

Essentials of Statistics for Business and Economics 9
The Bureau of Transportation Statistics Omnibus Household Survey is conducted annually and serves as an information source for the U.S. Department of Transportation. In one part of the survey the person being interviewed was asked to respond to the following statement: Drivers of motor vehicles shoul

Essentials of Statistics for Business and Economics 9
Because of staffing decisions, managers of the Gibson-Marimont Hotel are interested in the variability in the number of rooms occupied per day during a particular season of the year. A sample of 20 days of operation shows a sample mean of 290 rooms occupied per day and a sample standard deviation of

Essentials of Statistics for Business and Economics 9
The time married men with children spend on child care averages 6.4 hours per week. You belong to a professional group on family practices that would like to do its own study to determine if the time married men in your area spend on child care per week differs from the reported mean of 6.4 hours per

Essentials of Statistics for Business and Economics 9
A consulting firm submitted a bid for a large research project. The firms management initially felt they had a 5050 chance of getting the project. However, the agency to which the bid was submitted subsequently requested additional information on the bid. Past experience indicates that for 75% of the

Essentials of Statistics for Business and Economics 9
The American Institute of Certified Tax Planners reports that the average U.S. CPA works 60 hours per week during tax season. Do CPAs in states that have flat state income tax rates work fewer hours per week during tax season? Conduct a hypothesis test to determine if this is so. a. Formulate hypo

Essentials of Statistics for Business and Economics 9
Suppose that an independent study of middle-level managers employed at companies located in Atlanta, Georgia, was conducted to compare the salaries of managers working at firms in Atlanta to the salaries of middle-level managers across the nation. The following data show the salary, in thousands of d

Essentials of Statistics for Business and Economics 9
Suppose that the mean retail price per gallon of regular grade gasoline in the United States is $3.43 with a standard deviation of $.10 and that the retail price per gallon has a bell-shaped distribution. a. What percentage of regular grade gasoline sold between $3.33 and $3.53 per gallon? b. What pe

Essentials of Statistics for Business and Economics 9
Suppose a new production method will be implemented if a hypothesis test supports the conclusion that the new method reduces the mean operating cost per hour. a. State the appropriate null and alternative hypotheses if the mean cost for the current production method is $220 per hour. b. What is the T

Essentials of Statistics for Business and Economics 9
Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the mean and median.

Essentials of Statistics for Business and Economics 9
According to the Census Bureau, 2,475,780 people are employed by the federal government in the United States as of 2018. Suppose that a random sample of 3,500 of these federal employees was selected and the number of sick hours each of these employees took last year was collected from an electronic p