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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:

1. What is the null hypothesis?
2. What is the alternative hypothesis?
3. Is this hypothesis and the available data appropriate for a z test? Why or why not?
4. 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:

1. What is the null hypothesis?
2. What is the alternative hypothesis?
3. Based on the information available, would you say this image creator’s hypothesis is supported? Why or why not?
4. 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:

1. What is the null hypothesis?
2. What is the alternative hypothesis?
3. Assume the hypothesis was incorrectly rejected. What type of error is this?
4. What is one way you can decrease that type of error?
5. Assume the hypothesis was incorrectly accepted. What type of error is this?
6. What is one way you can decrease that type of error?