Questions from Applied Statistics

Q: To choose a sample of 12 students from a statistics class of

To choose a sample of 12 students from a statistics class of 36 students, which type of sample (simple random, systematic, cluster, convenience), is each of these? a. Picking every student who was we...

Q: Which is not an ethical obligation of a statistician? Explain.

Which is not an ethical obligation of a statistician? Explain. a. To know and follow accepted procedures. b. To ensure data integrity and accurate calculations. c. To support client wishes in drawing...

Q: Why are p charts widely used in service applications like health care

Why are p charts widely used in service applications like health care?

Q: Make a fishbone chart (cause-and-effect diagram)

Make a fishbone chart (cause-and-effect diagram) like the following for the reasons you have ever been (or could be) late to class. Use as many branches as necessary. Which factors are most important?...

Q: A forecasting model is fitted to sales data over 24 months.

A forecasting model is fitted to sales data over 24 months. Forecasting errors are tabulated to reveal whether the model provides an overestimate (1) or an underestimate (2) for each month’s sales. Th...

Q: Make a fishbone chart (cause-and-effect diagram)

Make a fishbone chart (cause-and-effect diagram) for the reasons your end-of-month checkbook balance may not match your bank statement. Use as many branches as necessary. Which factors are most import...

Q: Make a fishbone chart (cause-and-effect diagram)

Make a fishbone chart (cause-and-effect diagram) for the reasons an airline flight might be late to arrive. Use as many branches as necessary. Which factors are most important? Which are most easily c...

Q: For a multiple regression, which statement is true? Why not

For a multiple regression, which statement is true? Why not the others? a. Evans’ Rule suggests at least 10 observations for each predictor. b. The tcalc in a test for significance of a binary predic...

Q: A researcher used stepwise regression to create regression models to predict CarTheft

A researcher used stepwise regression to create regression models to predict CarTheft (thefts per 1,000) using four predictors: Income (per capita income), Unem (unemployment percent), Pupil/ Tea (pup...

Q: Researchers found a correlation coefficient of r = .50 on personality

Researchers found a correlation coefficient of r = .50 on personality measures for identical twins. A reporter interpreted this to mean that “the environment orchestrated one-half of their personality...