A t-distribution looks a lot like a normal distribution, but it is a bit more spread out

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A t-distribution looks a lot like a normal distribution, but it is a bit more spread out than a normal distribution with more observations in the “tails,” fewer in the middle. To determine whether a result is out in the tail of a normal distribution, we use a standardized statistic of 2 as our guideline. We can use the same guideline for t-distributions. Suppose, however, the standardized statistic of 2 was a precise rule for a normal distribution. Would the corresponding precise rule for a t-distribution use a number that was more or less than 2? Explain.

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Introduction To Statistical Investigations

ISBN: 9781119683452

2nd Edition

Authors: Beth L.Chance, George W.Cobb, Allan J.Rossman Nathan Tintle, Todd Swanson Soma Roy

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