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You have been studying your favorite candy, Hot Tamales. You measure the mass of 18 randomly chosen pieces. The data (units are grams) is displayed in the table below, and a histogram is reasonably symmetric. Estimate the mean mass of all Hot Tamales. Use a 80% confidence level. 2.71 2.67 3.06 2.8 2.83 2.87 2.93 2.74 2.7 2.86 2.44 2.89 2.7 2.63 2.62 3.01 2.82 3.19 (Checksum: 50.47) a) Establish that the normal distribution applies as a foundation. 123 b) Find the critical value and standard error. Critical Value: Standard Error: c) Find the confidence interval: d) Interpret your 80% confidence interval in context. Question Help: Video Submit Question