Monday = STUDY!

Study for your "Inferences for Means" test Tuesday by (first) completing AND GRADING the "All Things T" review packet provided in class (or linked below).

• Here is a link to the review packet in case you lost yours or were out:
• Click Me for the All Things T Review Packet!
• And here is a link to the key so you can grade your review packet!
• Click Me for the Review Packet ANSWER KEY!

Here's a list of what you need to know for tomorrow's test:

• Conducted a (1 Sample) T Test and (1 Sample) T Interval
• Full process
• Interval = Conditions, Math, Interpret Interval
• Test = Hypotheses, Conditions, Math, Interpret
• Conduct a 2 Sample T Test and 2 Sample T Interval (full process)
• Conduct a Paired T Test and a Paired T Interval (full process)
• Remember, you only need to copy the calculator screen to get full credit for any "math" section--you do not need to show an interval formula, a z/t score formula, or sketch a model
• However, there WILL be questions that require you to know these formulas on tomorrow's test, so you can't completely ignore these formulas!
• Define a Type 1 and Type 2 error for any type of hypothesis test context (1 Sample T, 2 Sample T, or Paired T)
• Know how to use a confidence interval to test hypotheses (decide if you would reject or fail to reject a null based on your interval)
• Know when we would (hypothetically) use a z test/interval for means vs. a t test/interval for means
• We use a z test/interval for means if we know the population standard deviation (sigma)
• We use a t test/interval for means if we only have the sample standard deviation, Sx
• Know how to find sample size given a margin of error
• Remember, we use z* for the critical value here, as we can't look up t* without n (and the point of these questions is to find n!)
• Interpret Confidence Level for any type of t interval
• Know how changing confidence level and/or sample size affect margin of error and the width of an interval
• Know how to calculate margin of error given summary statistics
• Know how to find the margin of error and a point estimate (sample statistic) using only/given only the interval
• Know how alpha, beta, power all relate
• Know how to interpret power

Extra Stamp Opportunity:

1. Finalize your ch. 24 notes--be sure you have all of the (correct) work for the 2 sample T interval (question a) and the 2 sample T test (question c) of the coffee shop context.
• Have all of this done in your notes and show me Monday or Tuesday for 2 stamps.