To investigate the question of whether the Brinell hardness of two materials A.and Bis difterent, 10 samples of each of the materials were taken and their Brinell hardness was determined. The following values resulted in [HBW]: A. 273.9 295.8 286.5 302.5 300 281.8 291.8 297.6 294.5 311 B. 272.9 279.8 275.5 277.5 282 269.8 275.8 272.6 263.5 286 The Brinell hardness of both populations can be assumed to be normally distributed. 1. Has the materials Aa significantly higher Brinell hardness? Name of the test procedure: Ou test for exact critical values Ou-test with NV approximation Ot-test for dependent samples O Welch test Ot-test for independent samples with homogeneous variances Significance level: O 0.5 O 0.05 O 0.1 O 0.01 O 0.001 Sensible alternative:

To investigate the question of whether the Brinell hardness of two materials A.and Bis difterent, 10 samples of each of the materials were taken and their Brinell hardness was determined. The following values resulted in [HBW]: A. 273.9 295.8 286.5 302.5 300 281.8 291.8 297.6 294.5 311 B. 272.9 279.8 275.5 277.5 282 269.8 275.8 272.6 263.5 286 The Brinell hardness of both populations can be assumed to be normally distributed. 1. Has the materials Aa significantly higher Brinell hardness? Name of the test procedure: Ou test for exact critical values Ou-test with NV approximation Ot-test for dependent samples O Welch test Ot-test for independent samples with homogeneous variances Significance level: O 0.5 O 0.05 O 0.1 O 0.01 O 0.001 Sensible alternative:

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Description: To investigate the question of whether the Brinell hardness of two materials A.and Bis different, 10 samples of each of thesematerials were taken and their Brinell hardness was determined. The following values resulted in [HBW]:A. 273.9 295.8 286.5

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter34: Customary Micrometers

Section: Chapter Questions

Problem 58A

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