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worty [1.4K]
4 years ago
14

The mean gpr averages of a random sample of 36 college seniors is calculated to be 2.6. the population standard deviation is 0.3

.
a. find the 95% confidence interval for the mean of the entire senior class.
b. find the 99% confidence interval for the mean of the entire senior class.
c. which confidence interval is wider? why?
Mathematics
1 answer:
Alika [10]4 years ago
8 0
A is the correct answer
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Option c is correct that is Home health aides.

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we know the store sold for every 5 "a", there were 3 "c" sold, so we can say that the adult to children shirts are on a 5 : 3 ratio.

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\stackrel{\textit{\large ratios}}{\cfrac{\stackrel{adult}{a}}{\underset{children}{c}}~~ = ~~\cfrac{5}{3}}\qquad \implies \qquad \stackrel{\textit{we also know that \underline{a = c + 30}}}{\cfrac{c+30}{c}~~ = ~~\cfrac{5}{3}} \\\\\\ 3c+90=5c\implies 90 = 2c\implies \cfrac{90}{2}=c\implies \boxed{45=c}~\hfill \stackrel{c + 30}{\boxed{a=75}} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill \stackrel{total~sold}{120}~\hfill

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2 years ago
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~

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Answer: CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

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