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Problem 4 Use the following to answer parts a) - hi; A recent study' investigated whether fast food consumption Increases one's concentration of phthalates, an ingredient in plastics that has been linked to multiple health problems including hormone disruption. The study included 8,877 people who recorded all the food they ate over a 24 hour period and then provided a urine sample. One specific phthalate byproduct that was measured (in ng/ml) in the wine was DEHP. The mean concentration of DEHP in the 3095 participants who had eaten fast food was 83.6 with a standard deviation of 194 7 while the mean for the 5782 participants who had not eaten fast food was 59.1 with a standard deviation of 152.1. a) (2 points) The parameter of interest is the difference in mean concentration of DEHP, between those who had eaten fast food and those who had not. Identify the best point estimate, using proper notation. Best point estimate = (notation) (value) b) for this problem, is the necessary condition to use a t-distribution met? (1 point) Circle the correct answer: Yes No (1 point) Justify your answer: 4) (3 points) Calculate the standard error. Show your work in the space below and round your answer to 3 decimal places. SE = d) (2 points) How many degrees of freedom are there for this t-distribution? e) (2 points) For a 99% confidence interval, use Statkey or your graphing calculator to obtain the value of t*. Round your answer to 3 decimal places. Zota, A. R. Phillips, C.A, and Mitro, S.D., "Recent Fast Food Consumption and Bisphenol A and Phthalates