Inference for Means and Proportions

Directions

A. Decide on a topic of interest to you. Formulate a question that you would like to answer by using one of

the inference procedures studied in Part C:

One-Proportion Z One-Sample T

Two-Proportion Z Matched-Pairs T

Two-Sample T

B. Collect data appropriate for the procedure you chose to answer your question. You may find information

online, in printed media, or conduct your own survey or experiment. Use your imagination and ask

instructors for suggestions.

C. Summarize your information using StatCrunch. Include a graph and the inference output.

D. Present your work as a report created with MS Word.

Check for proper grammar and spelling before you submit your report.

Grading

Your Report Will Include:

Points Component

5 A title, your name, and the date.

5 A paragraph to tell why you chose to investigate your topic. Clearly state the

question that you will answer with the results of your study.

10 A paragraph to define the population, the sample, and the variable(s) involved

in your inference study.

5 A paragraph to tell the source of your data, and a well-labeled table of your data

if possible.

10 An appropriate summary of the data with statistics and graph from StatCrunch.

Write an interpretation of these descriptive summaries.

10 The thorough inference procedure, including checking of conditions, and the

StatCrunch output.

5 A paragraph to summarize the conclusions of your study, and to discuss any

misleading influences or lurking variables that may still appear.