SOLUTION: 4. Strength tests carried out on samples of two yarns spun to the same count gave the following results:
Number in
sample Sample
Mean Sample
variance
Yarn A 4 50 42
Yarn B 9
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-> SOLUTION: 4. Strength tests carried out on samples of two yarns spun to the same count gave the following results:
Number in
sample Sample
Mean Sample
variance
Yarn A 4 50 42
Yarn B 9
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Question 517747: 4. Strength tests carried out on samples of two yarns spun to the same count gave the following results:
Number in
sample Sample
Mean Sample
variance
Yarn A 4 50 42
Yarn B 9 42 56
The strengths are expressed in pounds. Does the difference in mean strengths indicate a real difference in the mean strengths of the yarn?
You can put this solution on YOUR website! Strength tests carried out on samples of two yarns spun to the same count gave the following results:
Number in sample Sample Mean Sample variance
Yarn A 4 50 42
Yarn B 9 42 56
The strengths are expressed in pounds. Does the difference in mean strengths indicate a real difference in the mean strengths of the yarn?
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Ho: uA - uB = 0
Ha: uA - uB is not 0 (claim)
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Sample mean: 50-42 = 8
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I ran a 2SampleTtest on my TI-84 to get:
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test stat: t = 1.9563
p-value: 0.0930
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Conclusion: Since the p-value is greater than 5%,
fail to reject Ho at the 5% level of significance.
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The test results do not support the claim.
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Cheers,
Stan H.
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