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vampirchik [111]
4 years ago
8

Can someone check if my answer is right?

Mathematics
1 answer:
Stells [14]4 years ago
8 0
Yes that’s correct!
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30.4

Step-by-step explanation:

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If the sales tax rate is 7.25% in California, then how much would you pay in Los Angeles for a coat that cost $120.00?
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We are interested in conducting a study to determine the percentage of voters of a state would vote for the incumbent governor.
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The minimum sample size is N=1537.

Step-by-step explanation:

We want to know the sample size to estimate the proportion of voters with a margin of error of 0.05, with a 95% of confidence.

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e=UL-LL=(p+z*\sqrt{\frac{p(1-p)}{N}}) -(p-z*\sqrt{\frac{p(1-p)}{N}})=2z\sqrt{\frac{p(1-p)}{N}}

We can calculate N from this

e=2z\sqrt{\frac{p(1-p)}{N}}\\\\\frac{p(1-p)}{N}=(\frac{e}{2z})^2\\\\N= (\frac{2z}{e})^2*p(1-p)

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The minimum sample size is N=1537.

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