Homework CH 7 MTH 245 - Chapter 7 HW Use the 5-step procedure to create the confidence intervals in #1 & #4. Refer to the CH 7 the power point for the procedure. DO NOT try to squeeze all of the required steps for these problems on this document. Write the steps on notebook paper or type them into a Word document. Include all necessary calculations and StatCrunch results. A Pew Research Center poll included 1708 randomly selected adults who were asked whether "global warming is a problem that requires immediate government action." Results showed that 939 of those surveyed indicated that immediate government action is required. 1} Construct a 99% Confidence Interval to estimate the proportion of adults believing that immediate government action is required. Work this problem by hand without using the CI function in StatCrunch or on the graphing calculator. Include all 5 steps. 2} Is there strong evidence supporting the claim that the majority (> 50%) is in favor of immediate government action? Explain your answer. 3} As a newly hired manager of a company that provides cell phone service, you want to determine the percentage of adults in your state who live in a household with cell phones and no land-line phones. How many adults must you survey? Assume that you want to be 90% confident that the sample percentage is within 4 percentage points of the true population percentage. In a test of effectiveness of garlic for lowering cholesterol, 47 subjects were treated with Garlicin, which is garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol [in mg/dL) have a mean of 3.2 and a standard deviation of 18.6. 4} Construct a 95% confidence interval to estimate the mean net change in LDL cholesterol after the garlic treatment. You can use technology for this problem. Include all 5 steps. 5} If we want to construct a 99% confidence interval from this information, WITHOUT actually calculating the interval, would it be smaller or larger than the one calculated in #4? Explain your