# The Process of Statistical Analysis in Psychology

# Web Activities

Click on the following links. Please note these will open in a new window.

*Activity 1:*

*z*** Tests: Hypothesis and requirements**

Your book discusses the null and alternative hypotheses, and the requirements of a *z* test. In this activity, you will apply this knowledge.

Go to this link: https://i.redd.it/825087j0ds3y.png

Answer the following questions:

- What is the null hypothesis?
- What is the alternative hypothesis?
- Is this hypothesis and the available data appropriate for a
*z*test? Why or why not? - What additional information would you need to calculate a
*z*test?

*Activity 2:*

*z*** Tests: Evaluating Claims**

Your book discusses the null and alternative hypotheses, and the idea of statistical significance. In this activity, you will apply this knowledge.

Go to this link: https://i.redd.it/825087j0ds3y.png

Answer the following questions:

- What is the null hypothesis?
- What is the alternative hypothesis?
- Based on the information available, would you say this image creator’s hypothesis is supported? Why or why not?
- What additional information would you need to support/not support the hypothesis?

Activity 3:

*z*** Tests: Types of Error**

Your book discusses the null and alternative hypotheses, and the two types of error--alpha (Type 1) and beta (Type 2). In this activity, you will apply this knowledge.

Go to this link: https://i.redd.it/825087j0ds3y.png

Answer the following questions:

- What is the null hypothesis?
- What is the alternative hypothesis?
- Assume the hypothesis was incorrectly rejected. What type of error is this?
- What is one way you can decrease that type of error?
- Assume the hypothesis was incorrectly accepted. What type of error is this?
- What is one way you can decrease that type of error?