1. The p-value helps a researcher determine:

Whether or not the results are statistically significant.

The size of an effect.

The strength of the relationship between the variables.

All of the above

2. The makers of biodegradable straws have an automated machine that is set to fill each box with 100 straws. At various times in the packaging process, we select a random sample of 121 boxes to see whether or not the machine is filling the boxes with an average of 100 straws per box

Which of the following is a statement of the null hypothesis?

The machine fills the boxes with the proper amount of straws. The average is 100 straws.

The machine is not filling the boxes with the proper amount of straws The average is not 100 straws.

The machine is not putting enough straws in the boxes. The average is less than 100 straws.

3. The makers of biodegradable straws have an automated machine that is set to fill each box with 100 straws. At various times in the packaging process, we select a random sample of 121 boxes to see whether or not the machine is filling the boxes with an average of 100 straws per box.

Which of the following is a statement of the alternative hypothesis?

The machine is not filling the boxes with the proper amount of straws. The average is not 100 straws.

The machine fills the boxes with the proper amount of straws. The average is 100 straws.

The machine is not putting enough straws in the boxes. The average is less than 100 straws.

4. A magazine editor uses a data informed approach to determine which freelance writers should be offered a more permanent position. They take a pool of recommended freelance writers and determine that at least 80% of their work has been accepted for publication over a 2 year period.

The editor considers 50 candidates for hire. Of the 50 candidates, 3 of them have not been accepted for publication at an acceptable rate. With this data we test the following hypotheses at a 5% significance level:

H0: The proportion of accepted publications ofwriters being recommended for hire is equal to .8

Ha: The proportion of accepted publications ofwriters being recommended for hire is less than .8

The p-value is .43. What should the editor conclude?

Accept H0.

Fail to reject H0.

Reject H0.

5. Which of the following is a step in hypothesis testing?

Choosing a sample and collecting data

Assessing the claims

Statistical planning

Self Criticism

Understanding the sampling distribution of the sample mean