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7 Points] DETAILS ILLOWSKYINTROSTAT1 8.1.018.PR. MY NOTES ASK YOUR TEA sample of 20 heads of lettuce was selected. Assume that the population distribution of head weight is normal. The each head of lettuce was then recorded. The mean weight was 2.2 pounds with a standard deviation of 0.1 poun pulation standard deviation is known to be 0.2 pounds. onstruct a 95% confidence interval for the population mean weight of the heads of lettuce. State the confidence ound your answers to two decimal places.) etch the graph. (Round your answers to two decimal places.) CL = 95% X 2.2 Iculate the error bound. (Round your answer to two decimal places.) Additional Materials BeBook