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Measuring Weights When certain quantities are measured,

Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola ISBN: 9780321836960 18

Solution for problem 2RE Chapter 11.3

Elementary Statistics | 12th Edition

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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola

Elementary Statistics | 12th Edition

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Problem 2RE

Measuring Weights? When certain quantities are measured, the last digits tend to be uniformly distributed, but if they are estimated or reported, the last digits tend to have disproportionately more 0s or 5s. If we use the last digits (decimal portion) of the 80 weights in Data Set 1 from Appendix B, we get the frequency counts in the table below. Use a 0.05 significance level to test the claim that the last digits of 0, 1, 2, . . . , 9 occur with the same frequency. Does it appear that the weights were obtained through measurements? L a s t D i g i t F r e q u e n c y

Step-by-Step Solution:
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Solution 2RE Step1: Consider the hypothesis H : Last digits occur with the same probability. 0 H : Last digits do not occur with the same probability. 1 Level of significance, . The observed and expected frequencies are shown in the below table. (O - E)² / observed expected O - E E 6 8.000 -2.000 0.500 7 8.000 -1.000 0.125 4 8.000 -4.000 2.000 11 8.000 3.000 1.125 10 8.000 2.000 0.500 8...

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Chapter 11.3, Problem 2RE is Solved
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Textbook: Elementary Statistics
Edition: 12
Author: Mario F. Triola
ISBN: 9780321836960

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Measuring Weights When certain quantities are measured,

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