Mean weight-constructing confidence interval

Assignment Help Basic Statistics

Reference no: EM1317946

A human resource manager for Carver County is evaluating a recent effort to improve the health of the county's firefighters by providing an exercise room in each of the county's firehouses. Their records prior to installing the exercise rooms indicate that the mean weight of all county firefighters is 198 pounds with a standard deviation of 13 pounds. A random sample of 40 firefighters taken six months after the program was implemented revealed that the mean of the sample was 192 pounds.

Construct a 96% confidence interval for the mean weight of all firefighters six months after the exercise rooms were installed.

Assume that σ has not changed. Does it appear that the program is working?

Reference no: EM1317946

Questions Cloud

Ninety eight percent confidence interval : Create a 98 percent confidence interval for the population mean.

Determining the relative frequency histogram : Generate a relative frequency histogram using ten-point intervals to show the distribution of the scores.

Sketch possible graphs for all cases : Find whether x=3 is a local maximum or a local minimum and Sketch the graph - Sketch possible graphs for all four cases.

Supply drivers and demand drivers : Your readings for this unit mentioned supply and demand side drivers of health costs. Explain two supply drivers and two demand drivers of health care costs.

Mean weight-constructing confidence interval : Construct a 96% confidence interval for the mean weight of all firefighters six months after the exercise rooms were installed.

Derive an expression using the given data : Derive an expression using the given data - Show that this reduces to the integration-by-parts formula if u and v are continuous across x = c. It is not necessary for du/dx and dv/dx to be continuous at x = c.

Find maximum revenue : Find maximum revenue.

Promotional theme of company promotion : Allegra is an antihistamine, and to create brand awareness, its manufacturer is offering people who request information about the product a cushion to use at their favorite sporting event-This use of the same promotional theme throughout a company'..

Construction of stem and leaf plot diagram : The data below show the average daily high temperature for Chicago, Illinois, for twelve recent spring and summer months. Create a stem-and -leaf diagram for the data.

User Account

All Pages