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A local school board would like to test the hypothesis that the proportion of Americans who think ...
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A local school board would like to test the hypothesis that the proportion of Americans who think ...
A local school board would like to test the hypothesis that the proportion of Americans who think unions have a positive effect on schools has decreased this year when compared to last year. A random sample of 160 Americans last year found that 48 felt unions have a positive effect on schools. A random sample of 140 Americans this year found that 28 felt unions have a positive effect on schools. Define Population 1 as this year and Population 2 as last year and use the critical value approach to test this hypothesis with
α
= 0.05.
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Business Statistics
Edition:
2
^{nd}
Author:
Donnelly
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More questions for this book are
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-z
_{α}
= -1.645
Because
z
_{p}
= -1.99 is less than -
z
_{α}
= -1.645, we reject the null hypothesis. Therefore, the school board can conclude that the proportion of Americans who think unions have a positive effect on schools has decreased this year when compared to last year.
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I appreciate what you did here, answered it right
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