statistics 342

I5 (Week 5) Individual Assignment Final: z-test

Identify a research problem different from the previous research problems that uses two different sets of the same type of data. You may use any business subject. Some examples: Sales from two different months or years. GPA’s of men and women. Number of two different shelf items sold by month over a year. Home sales prices in different suburbs, cities, counties or states. Select data that have absolute zero measurements (Ratio data). You may use recorded data or made up data. The n sample size should be at least 30 in each set, but not more than 50. Prepare a paper with a table of contents. Describe the research problem, research purpose and one research question. Include a definition of the variables you are measuring. List the data. List alpha, the null and alternative hypothesis, and give a brief back ground. Using either Megastats or Analysis ToolPak do descriptive statistics on the data and do data analysis describing the data. Do runs plot graphs. Interpret the Goodness of Fit (GOF) p-value to decide if the data is parametric (normal) or nonparametric.

z-Test: Open Excel, log in both data sets. Go to Add Ins, Megastat or Analysis ToolPak, Hypothesis Tests, Compare Two Independent Groups, left mouse click highlight Group 1 then Group 2, check z-test in the box. (Assuming Equal Variances). OK. Conclude. Use the I5 sample as a guide. This paper should be between 900-1200 words. Post as an Individual assignment. Title the document file “z-Test I5”.