Need to know how to use your Texas Instruments graphing calculator for your college math or statistics class? You're in luck... watch this video tutorial to see how to construct intervals with a TI-83 graphing calculator.

Constructing a confidence interval for a single population mean, sigma known.

The Fluffy Lump is a cat toy company that sells catnip by the pound. Although the boxes are advertised at 16oz., a random sample of 50 boxes yielded a mean of 16.2 oz and the asumed population standard deviation of 0.04 oz. Construct a 95% confidence interval for the population mean weight of boxes of catnip.

## Construct intervals with a TI-83 graphing calculator

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