Hypothesis Tests Practice 1. Identify the null and alternative hypotheses. a. Claim: The mean amount of corn oil contained in each bottle is greater than 1.5 liter. Ho: _____________________ Ha: ___________________ b. Claim: The mean commute time for Cal Poly Pomona students is greater than or equal to 20 minutes.

Ho: _____________________ Ha: ___________________ 2. Find the p -value and the critical value(s) for the following hypothesis tests. Ho : = , Ha : , n = 40, = . , = . , significance level: .02

3. A sample was collected to test the claim that the mean weight of discarded plastic from the population of households is greater than 1.8 lb. The sample consists of weights of discarded plastic from 62 households, and the mean weight is 1.911 lb with the standard deviation of 1.065 lb. Conduct a hypothesis test with the significance level of 0.01. Step 1. Ho: __________________ Ha: ___________________ Lower tail Upper tail Two tail test (Circle one.) What distribution do you need to use? _______________________ Step 2. = _____________ Critical Value(s): Step 3. Test statistic: Step 4. Find the p-value and compare: Step 5. Compare the critical value: Reject the null? Yes No Step 6. Conclusion.