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• ## Discussion

 0 answersPost by Xiang Dong on April 5 at 12:29:50 AMAlso in the Confidence Interval example, when using the calculator to calculate the confidence interval with "T interval" , the "n" should be 17 instead of 16. It should be number of sample instead of degrees of freedom. If you calculated with the formula first and then checked on the calculator, you would not mistake this. Always double check. 1 answerLast reply by: Xiang DongWed Apr 5, 2017 12:17 AMPost by Carlos Rosa on February 27 at 01:29:56 AMIn your Confidence Interval example you added two statistics when writing them on the list on your calculator, so that kind of messed up the calculations the calculator gave you back.

### The T Distribution

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

• Intro 0:00
• Lesson Overview 0:07
• When Do We Use the T Distribution 0:26
• When Do We Use the T Distribution
• What is the T Distribution? 1:46
• What is the T Distribution?
• Confidence Interval Example 2:49
• Construct and Interpret a 90% Confidence Interval to Estimate the Mean
• Hypothesis Test Example 16:59
• 1. Write the Hypothesis
• 2. Check Conditions
• 3. Calculate the Test Statistic
• 4. Look Up the P-value
• 5. Interpret
• Matched Pairs T-test 29:34
• Matched Pairs T-test
• 1. Write the Hypothesis
• 2. Check Conditions
• 3. Calculate the Test Statistic
• 4. Look Up the P-value
• 5. Interpret