Use the Following to Answer Questions

question 31

Short Answer

Use the following to answer questions :
A random sample of 20 elements selected from a population produced a variance equal to 11.072.Assume that the population is normally distributed.
-Based on this sample,the 90% confidence interval for the population variance,rounded to three decimal places,is:

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Definitions:

Acceptable Error

The margin of error or deviation from a standard value that is deemed tolerable within specific contexts, such as measurements or quality control.

Confidence

A measure of the degree to which one is certain about a particular prediction or outcome.

Predetermined Time

A technique in time and motion study where standard times are assigned to basic motions and tasks, used for setting standard times for work activities.

Standard Deviation

A numerical indicator that calculates the spread or variability among a collection of data points.