us make decision of needing repair in the first three years. A different brand may have a 3-year repair rate of 19%. If a footnote says, "differences of more than 4% are meaningless," we can conclude that the repair rates really are not that different! However, any refrigerator with a repair rate more than 4% higher than 17% is more likely to need repair in the next three years. Locate & Complete For this discussion, locate a confidence interval that you have used in your work or professional life. Provide a link to the data and respond to the following questions. How did this data help in your decision-making process? . If you had the choice to make that decision again, would you make the same decision and why? Suggestion from your Instructor Students who have not had confidence interval experience in their work/profession, can use the following alternate topic for Discussion. As a new hired in a market research firm you are asked to plan and conduct a survey to estimate the percent of teen-agers who would buy a certain product if available. You are also instructed to estimate the percent within a margin of error no greater than 3% (E-.03) with 95% confidence.. 1. Use the formula n = (#)"x (p xq") to find the sample size n, where z-1.96, and E=.03 Since you have no information about the estimate proportion p you decide to use (0.5 x 0.5) 2. Use p" = 0.58 and your found n to calculate a 95% confidence interval for the true population proportion p. 3. Justify you decision to use (0.5 x 0.5) in your formula to find n when p" is unknown. * Tip: Copy and paste the questions into your initial post. Your initial response should be three paragraphs in length. Use current APA formatting to cite your sources. Post & Discuss Make your initial post by the fourth day of the module week. Return to the discussion later in the module week to read and reply to at least two of your ci X