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Get Full Access to Stats Modeling The World - 4 Edition - Chapter 22 - Problem 3
Get Full Access to Stats Modeling The World - 4 Edition - Chapter 22 - Problem 3

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# t-models, part I Using the t tables, software, or a calculator, estimate a) the critical ISBN: 9780321854018 481

## Solution for problem 3 Chapter 22

Stats Modeling the World | 4th Edition

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Problem 3

t-models, part I Using the t tables, software, or a calculator, estimate a) the critical value of t for a 90% confidence interval with df = 17. b) the critical value of t for a 98% confidence interval with df = 88. c) the P-value for t 2.09 with 4 degrees of freedom. d) the P-value for _ t _ 7 1.78 with 22 degrees of freedom.

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Statistics 201 9/06/16  Dispersion­ spread ­Info about location (avg or median)  Range­ difference between max and min ­Range=max­min  Positive/right skew ­ mean is pulled to the right, and is larger than the median  Negative/left skew ­mean is pulled to the left, and is smaller than the median  Symmetric/bell shaped ­ mean is approximately the same as median  IQR= Q ­Q3 1 ­ is not effected by extreme values b/c os ca;culated using values that lie close to the center of the data set. IQR is not used in inferential statistics but are useful as descriptive statist

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##### ISBN: 9780321854018

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