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

question 55

Multiple Choice

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?

• A)Between 1 and 2 days
• B)Between 2 and 3 days
• C)Between 3 and 4 days
• D)Between 4 and 5 days

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Definitions:

Hypothesis Testing

A method of statistical inference used to decide whether a hypothesis about a parameter in a population is likely to be true.

Interval Estimation

A scope of values, from collected sample data, that is likely to embody the value of an unexplored population parameter.

Confidence Interval

A range of values, derived from the sample statistics, within which there is a specified level of confidence where the true parameter lies.

Standard Error

The standard deviation of the sampling distribution of a statistic, typically mean, estimating the variability.