# Ch23 - Chapter 23 Inference About Means One-sample...

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Chapter 23 Inference About Means

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One-sample t-interval When the conditions are met, we are ready to find the confidence interval for the population mean, µ. The confidence interval is where the standard error of the sample mean is ( 29 ± - _ * 1 _ SE y t y n n s y = _ SE
How to find the critical value? The critical value depends on 2 things: the confidence level and the number of degrees of freedom, n-1 (the sample size minus 1). * 1 - n t

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Notice we have s and not h Since we will be dealing with values from a population, we would have to find the standard deviation of those values (back from Chapter 5). However, for the Final Exam, the value will be provided for you.
In 1998, as an advertising campaign, the Nabisco Company announced a “1000 Chips Challenge,” claiming that every 18-ounce bag of their Chips Ahoy cookies contained at least 1000 chocolate chips. The following are the numbers of chocolate

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## This note was uploaded on 09/16/2011 for the course AMAT 108 taught by Professor Sutphin during the Fall '07 term at SUNY Albany.

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Ch23 - Chapter 23 Inference About Means One-sample...

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