Data are drawn from a bell-shaped distribution with a mean of 20 and a standard deviation of 2. a. Approximately what percentage of the observations fall between 18 and 22? (Round your answer to the nearest

Data are drawn from a bell-shaped distribution with a mean of 20 and a standard deviation of 2. a. Approximately what percentage of the observations fall between 18 and 22? (Round your answer to the nearest whole percent.) Percentage of observations b. Approximately what percentage of the observations fall between 16 and 24? (Round your answer to the nearest whole percent.) Percentage of observations c. Approximately what percentage of the observations are less than 16? (Round your answer to 1 decimal place.) Percentage of observations

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Data are drawn from a bell-shaped distribution with a mean of 20 and a standard deviation of 2. a. Approximately what percentage of the observations fall between 18 and 22? (Rou…

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