Review: 1-sample t-Interval

Warm-Up

​Review the 1-sample t-Interval

Today we will learn how to conduct a 1-sample t-Test. Before we do that, let's review a few things.

Multiple Choice

Find the mean and standard deviation for the data set: {12, 8, 8, 9, 10, 15, 4}

• Mean = 9.43

  SD = 3.20

• Mean = 6.34

  SD = 3.06

• Mean = 12.8

  SD = 5.68

• Mean = 9.43

  SD = 3.46

Multiple Choice

If you want to construct a 90% confidence interval using a sample size of 20, what critical value should you use?

• t* = 2.093

• t* = 1.729

• t* = 1.725

• t* = 2.086

Multiple Choice

Find a 98% confidence interval for the average time to complete a task. Sample data set is: {12, 8, 8, 9, 10, 15, 4}

• (4.58, 14.27)

• (6.89, 11.97)

• (5.32, 13.54)

• (3.20, 5.84)

Multiple Choice

For the 3rd quarter project, Alan estimated the average rainfall in inches in cities in North America in 2024. His interval result is (28, 36).

What is the sample mean?

• 32

• 8

• 4

• 36

Multiple Choice

For the 3rd quarter project, Alan estimated the average rainfall in inches in cities in North America in 2024. His interval result is (28, 36).

What is the margin of error?

• 32

• 8

• 4

• 36

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Copy down today's learning objective on your notes:

"Students will be able to conduct a 1-sample t-test."

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