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There are 2 types of statistical inference:

• hypothesis tests
• confidence intervals

 

We finished one type of hypothesis tests last time — one-sample t test. There are other types of hypothesis tests such as two-sample t tests, etc. But we will take a short break from hypothesis tests and start confidence intervals today.

 

Instructions

• There are 3 problems in this lab work. The problems are not in the book.

• • 2 problems (z* critical value)
    • For #2, notice that the single tail area of 0.5 lies exactly halfway between 0.0495 and 0.0505. Therefore our z* critical value should also be halfway between z = 1.64 and z = 1.65. That is, z* = 1.645.

• • 1 problem (t* critical value)

 

• The video explains the concept and shows you how to do the lab work:

Ch 14 & 17 Confidence Intervals

• Submit your lab work as one single PDF file to Canvas before the due date.

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