as below

t Tests and Two-Way Tables

.

Learning Objectives

By the end of this week, you should be able to:

· Draw conclusions regarding t tests and chi-square tests using the four-step hypothesis test process.

· Construct confidence intervals about sample means using the t distribution.

· Test hypotheses about independence of qualitative variables in a two-way table.

· Choose an appropriate statistical test for a given data set.

· Use Statdisk to compute t-tests and Chi-Square tests of significance.

Photo Credit: [gobyg]/[Digital Vision Vectors]/Getty Images

Required Readings

Bennett, J. O., Briggs, W. L., & Triola, M. F. (2009). Statistical reasoning for everyday life (3rd ed.). Boston: Addison-Wesley.

 

To access the chapters listed below, click on the MyStatLab link on the course navigation menu and select the "MyStatLab Bridge" link. Then, go to the Week 5 tab and click on Resources.

Chapter 10, "t Tests, Two-Way Tables, and ANOVA"

· Introduction

· Section 10.1, "t Distribution for Inferences about a Mean"

· Section 10.2, "Hypothesis Testing with Two-Way Tables" In this chapter, you'll continue to work with hypothesis tests, and you'll learn to use the t distribution and two-way tables.

This week's Introduction about a NASA rocket provided an example of when a t test may be used in a real-life situation. In this Discussion, you will analyze a research question of your choice using a t test.

To prepare for this Assignment:

· Review problems 17–24 on pages 416–417 of your text, which show how t tests can be used to analyze real-life data. Think about how you might answer each of the questions.

· Think about one small data set that you would like to compare to a proposed mean. For example, you could compare the mean weight of a bag of chocolate chip cookies to the mean that the industry claims. Clearly outline your null and alternative hypothesis statements.

· Consider why your research question is important.

· Outline how you would use each of the steps of the four-step hypothesis test process to answer the research question.

· Think about how using a t test could help your analysis. How is the outcome from the t test used to support the claim made?

Write a 1- to 2-paragraph write-up including the following:

· Describe your research question, and explain its importance

· Describe how you would use the four-step hypothesis test process to answer your research question.

· Explain how using a t test could help you answer your research question.