Wednesday HW

Tonight, please  complete the following in your textbook (or posted below) and check your answers (also posted below):

• Pages 470-472: 11 (all parts), 12ae, 114ad
• For 11: 
• b: "check assumptions" is the same as "check conditions"
• c: "perform mechanics" means do the math--show a shaded Normal model, p-value, and z-score
• d: use today's notes to interpret the p-value
• e: write a conclusion based on today's notes
• For 12 and 14, write hypotheses, then enter the correct information in "one prop z test" in your calculator to get the p-value (listed as p on your calculator). Lastly, write the conclusion.
• So you can skip conditions and showing all the math work, just generate p-value on your calculator.
• Use an alpha level of 5% for all conclusions!

• Homework Answer Key Linked Below
• 11, 12, 14 Textbook HW KEY (Click Me!)

Today's Takeaways--what we learned (hopefully):

1.) Showing the math work efficiently--how to use graphing calc

2.) Interpret p-value (see below)

3.) Writing conclusions for a hypothesis test

• Here's another example of interpreting the p-value based on today's stamp:
• Context: previously 37% of people were satisfied with parking lot
• We made some changes to the lot; after the changes we surveyed 200 people, and 83 were satisfied with the changes
• PValue = .094
• "IF it's true that 37% of people are satisfied with the parking there is a 9.4% chance we get a p-hat = 0.415 or higher."

• And here's the template for writing conclusions:
• Compare pvalue to alpha/significance level (given in question, or just pick 5% = .05 as your alpha/significance level)
• If p-value is less than alpha -- reject Ho
• If p-value is greater than alpha--fail to reject Ho
• Here's a template for writing your conclusions: use this for 11e, 14d, and 12e