An experiment was conducted to test the effect of a new stain remover. Twenty stains were treated with stain remover A and stain remover B for a week, then the number of stains removed was measured. A significance test was conducted at the a = 0.10 level for the difference in the means of the number of stains removed between stain remover A and stain remover B. The test resulted in t = 1.37 and p = 0.17. If the alternative hypothesis in question is Ha: HA - HB #0, where μA equals the mean number of stains removed with stain remover A and μg equals the mean number of stains removed with stain remover B, what conclusion can be drawn? O There is a significant difference in the mean effectiveness of two stain removers. O There is sufficient evidence that stain remover A works better than stain remover B. O The proportion of stains that stain remover A removed is greater than the proportion of stains removed by stain remover B. O There is insufficient evidence that the proportion of stains removed by stain remover A and stain remover B is different. O There is insufficient evidence that there is a difference in the mean effectiveness of stain remover A and the mean effectiveness of stain remover B.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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An experiment was conducted to test the effect of a new stain remover. Twenty stains were treated with stain remover A and stain remover B for a week, then the number of stains removed was measured. A
significance test was conducted at the a = 0.10 level for the difference in the means of the number of stains removed between stain remover A and stain remover B. The test resulted in t = 1.37 and p = 0.17. If the
alternative hypothesis in question is Ha: HA - HB #0, where μA equals the mean number of stains removed with stain remover A and μg equals the mean number of stains removed with stain remover B, what
conclusion can be drawn?
O There is a significant difference in the mean effectiveness of two stain removers.
O There is sufficient evidence that stain remover A works better than stain remover B.
O The proportion of stains that stain remover A removed is greater than the proportion of stains removed by stain remover B.
O There is insufficient evidence that the proportion of stains removed by stain remover A and stain remover B is different.
O There is insufficient evidence that there is a difference in the mean effectiveness of stain remover A and the mean effectiveness of stain remover B.
Transcribed Image Text:An experiment was conducted to test the effect of a new stain remover. Twenty stains were treated with stain remover A and stain remover B for a week, then the number of stains removed was measured. A significance test was conducted at the a = 0.10 level for the difference in the means of the number of stains removed between stain remover A and stain remover B. The test resulted in t = 1.37 and p = 0.17. If the alternative hypothesis in question is Ha: HA - HB #0, where μA equals the mean number of stains removed with stain remover A and μg equals the mean number of stains removed with stain remover B, what conclusion can be drawn? O There is a significant difference in the mean effectiveness of two stain removers. O There is sufficient evidence that stain remover A works better than stain remover B. O The proportion of stains that stain remover A removed is greater than the proportion of stains removed by stain remover B. O There is insufficient evidence that the proportion of stains removed by stain remover A and stain remover B is different. O There is insufficient evidence that there is a difference in the mean effectiveness of stain remover A and the mean effectiveness of stain remover B.
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