Question: The data set has 150 observations and has mean 35 and standard deviation 4. Approximately how many observations lie between 31 and 39? The quantitative

The data set has 150 observations and has mean 35 and standard deviation 4. Approximately how many observations lie between 31 and 39?

The quantitative data set under consideration has roughly a bell-shaped distribution. Apply the empirical rule to solve.

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