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Author Question: A two-way contingency table is analyzed with a . a. chi-square goodness-of-fit test b. ... (Read 74 times)

jayhills49

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on: Aug 1, 2018
A two-way contingency table is analyzed with a .
 
  a. chi-square goodness-of-fit test
  b. chi-square test of independence
  c. Mann-Whitney U test
  d. Wilcoxon signed-ranks test

Question 2

A manufacturer uses a new production method to produce steel rods.
 
  A random sample of 17 steel rods resulted in lengths with a standard deviation of 4.6 cm. At the 0.10 significance level, test the claim that the new production method has lengths with a standard deviation different from 3.5 cm, which was the standard deviation for the old method.


voltaire123

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Reply #1 on: Aug 1, 2018
Answer to Question 1

B

Answer to Question 2

Test statistic: X2 = 27.637. Critical values: X2 = 7.962, 26.296. Reject . There is sufficient evidence to support the claim that the standard deviation is different from 3.5.


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