QUESTION 11 Complete the following z-score problem. According to an article published in 2014, Americans between 50 and 64 years old consume more caffeine than any other age group. Harold surveys a SRS of 2,000 Americans in this age group and finds them to consume a mean of 220 mg of caffeine per day. Find a 98% confidence interval for the mean amount of caffeine consumed by Americans between the ages of 50 and 64. Assume that o = 90 mg. a. State the point-estimate. Work/Explanation Answer b. Determine the standard error to the nearest hundredth. Work/Explanation Answer C. Identify the critical value. Work/Explanation Answer d. Determine the margin of error to the nearest tenth. Work/Explanation Answere. State the confidence interval. Round values to the nearest tenth. Answer SUS Work/Explanation f. Fill in the blanks below to state your conclusion: We can conclude with confidence that Americans between 50-64 years old consume a mean amount of caffeine that is between and on a daily basis. This means that the probability that is