U4d1-64 – need to know spss – what is a null hypothesis and an

U4D1 – Applying Hypothesis Testing

For this discussion, answer the following questions:

•  What is a null hypothesis?

• What is an alternative hypothesis?

Then articulate a null hypothesis and alternative hypothesis for a research study that pertains to your area of specialization.

• What conclusions can be drawn from this study with a “statistically significant” result?


To successfully complete this learning unit, you will be expected to:

1. Analyze case studies of Type I and Type II errors.

2. Analyze case studies of null hypothesis testing.

Unit 4 Study 1 – Readings

Use your Warner text, Applied Statistics: From Bivariate Through Multivariate Techniques , to complete

the following:

• Read Chapter 3, “Statistical Significance Testing,” pages 81–124. This reading addresses the following topics:

◦ The logic of null hypothesis testing.

◦ Type I and Type II errors.

◦ The z test.

◦ Null hypothesis and alternative hypothesis.

◦ Limiting Type I error.

◦ Effect size.

◦ Statistical power.

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