Questions from Business Analytics

Q: Conduct a chi-square test to determine if a normal distribution

Conduct a chi-square test to determine if a normal distribution can reasonably model the expense data in the Excel file Travel Expenses.

Q: Conduct a chi-square test to determine if a normal distribution

Conduct a chi-square test to determine if a normal distribution can reasonably model the sum of the midterm and final exam grades in the Excel file Student Grades.

Q: Looking at the data and information in the Excel file TV Viewing

Looking at the data and information in the Excel file TV Viewing Survey, state some examples of interesting hypothesis tests by proposing null and alternative hypotheses.

Q: A pharmaceutical company in Australia is testing a medical drug that intends

A pharmaceutical company in Australia is testing a medical drug that intends to increase heart rate. A sample of 124 tests yielded a mean increase of 1.4 beats per minute, with a population standard d...

Q: An analyst at a business school in France is assessing students’ performance

An analyst at a business school in France is assessing students’ performance. Historical records of applicants suggest that the mean score obtained by students attending the school is 350. The busines...

Q: The yearly government tax revenue (in $ millions) depends on

The yearly government tax revenue (in $ millions) depends on customer income, business profits, and capital gains defined as tax = -2.556 + 3.799 *income + 1.583 * profit + 0.739 * capital. a. Interpr...

Q: According to a magazine, people read an average of more than

According to a magazine, people read an average of more than three books in a month. A survey of 20 random individuals found that the mean number of books they read was 2.9 with a standard deviation o...

Q: Using the data in the Excel file Kidney, apply the Excel

Using the data in the Excel file Kidney, apply the Excel Regression tool using kidney frailty rates and age of a person as the variables. Interpret all key regression results, hypothesis tests, and co...

Q: The Excel file Horsepower versus Gasoline provides data on the amount of

The Excel file Horsepower versus Gasoline provides data on the amount of gasoline used per 100 miles by different brands of cars along with their horsepower. a. Construct a scatter diagram for gasolin...

Q: Using the data in the Excel file Student Grades, apply the

Using the data in the Excel file Student Grades, apply the Excel Regression tool using the midterm grade as the independent variable and the final exam grade as the dependent variable. Interpret all k...