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An Activity Has an Optimistic Time Estimate of 12 Days,a

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An activity has an optimistic time estimate of 12 days,a most likely estimate of 16 days,and a pessimistic estimate of 22 days.What is the expected standard deviation of the activity?


Definitions:

Chi-squared Distribution

A statistical distribution that describes the distribution of the sum of the squares of a set of variables that follow a normal distribution, commonly used in hypothesis testing.

Positively Skewed

A distribution shape where the tail is longer on the right side, indicating that the mean and median are greater than the mode.

Chi-squared Distribution

A probability distribution that describes the distribution of the sum of the squares of variables that are independently distributed according to a standard normal distribution.

Degrees of Freedom

The number of independent values or quantities that can vary in an analysis without violating any constraints.

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