Week 2 work for BUS 308

Discussions

1. Hypotheses
   
   What is a hypothesis test? Why do we need to use them to make decisions about relating sample results to the population; why can’t we just make our decisions by the sample value?

       

2. Variation
   
   Variation exists in virtually all parts of our lives. We often see variation in results in what we spend (utility costs each month, food costs, business supplies, etc.). Consider the measures and data you use (in either your personal or job activities). When are differences (between one time period and another, between different production lines, etc.) between average or actual results important? How can you or your department decide whether or not the observed differences over time are important? How could using a mean difference test help?

Assignment
To complete the following assignment.

Problem Set Week Two

In the Week Two Assignment sheet, complete the problems below and submit your work in an Excel document. Be sure to show all of your work and clearly label all calculations. All statistical calculations will use the Employee Salary Data Set and Week 2 assignment sheet.

(Note: Questions 1- 4 have additional elements to respond to below the analysis results and included in the Week Two Assignment sheet are 2 one-sample t-tests comparing male and female average salaries to the overall sample mean.)