# Z Test for the Mean

Taught by muchomath
• Currently 4.0/5 Stars.
5601 views | 3 ratings
Meets NCTM Standards:
Lesson Summary:

In this lesson, Professor Betis explains how to use the Z test for the mean in statistics. He walks through a problem where a researcher reports that the average time it takes a student to drive to their community college campus is less than 24 minutes. Using a left-tailed test and a significance level of alpha equals 0.01, they calculate the critical value, test value, and ultimately make a decision to reject the null hypothesis and support the claim. The lesson concludes with a summary of the results and a reminder to seek help if needed.

Lesson Description:

Using the Z test in Statistics.

Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.

• What is the Z test?
• How do you identify the claim and define the hypothesis?
• What is a left-tailed hypothesis test?
• What is an alternate hypothesis?
• What is a null hypothesis?
• What are critical values for a normal distribution for statistics?
• What is an acceptance and rejection region?
• What is a sample standard deviation and how do you find it?
• What is a Z-score and how do you find it?
• How do you decide whether to accept the null hypothesis or reject it?
• #### Staff Review

• Currently 4.0/5 Stars.
This video does a great job of stepping through a college statistics problem, defining the hypothesis and claim, and using the Z test for a normal distribution to test the claim. A really helpful video for brushing up on this vital statistics topic.