Wednesday HW

Tonight, please complete the following in your textbook: (Period A notice problem 17 is changed to 19)

Page 471: 13, 19

• For each of these problems you need to conduct a full hypothesis test! All 4 parts!
• First, write your hypotheses: be sure to use correct notation!
• Next, check the conditions to be sure a one proportion z-test is appropriate!
• Now, show your math
• I would start by entering everything into the one-prop-z-test on your calculator to get the z-score, p-value, and p-hat
• Then, on your paper, "show the work"
• Show the formula used to calculate the z score (given on the calc)
• Sketch a Normal model and shade
• Record your p-value
• Finally, write your conclusion: use an alpha level of .05 (5%) for both problems!
• Remember, if the p-value is below the alpha level, we will reject the null hypothesis
• Reject the null: there IS evidence of the alternative
• If the p-value is above the alpha level, we fail to reject the null hypothesis!
• Fail to reject the null: there IS NOT evidence of the alternative
• Here is a writing template for your conclusions:
• Since the p-value of ______ is lower/higher than the ____% significance/alpha level, we will reject/fail to reject the null hypothesis. There is/is not significant evidence to conclude ___(here, interpret the Ha in context—what were we trying to prove?________ based on the given sample. 

Check your answers in the back of the book! We WILL NOT go over these in class tomorrow, so it's on you to check your understanding! (We aren't going over these b/c we'll be doing plenty of these tests in class)