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zaharov [31]
2 years ago
14

Please help with this question

Mathematics
1 answer:
puteri [66]2 years ago
4 0
The answer i found to be is C

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At Norman's Newsstand, 5 magazines cost $20.00. How many magazines could you buy with $44.00?
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2 years ago
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The mean per capita income is 15,451 dollars per annum with a variance of 298,116. What is the probability that the sample mean
docker41 [41]

Answer: 0.5467

Step-by-step explanation:

Let X be the random variable that represents the income (in dollars) of a randomly selected person.

Given : \mu=15451

\sigma^2=298116\\\\\Rightarrow\ \sigma=\sqrt{298116}=546

Sample size : n=350

z-score : \dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}

To find the probability that the sample mean would differ from the true mean by less than 22 dollars, the interval will be

\mu-22,\ \mu+22\\\\=15,451 -22,\ 15,451 +22\\\\=15429,\ 15473

For x=15429

z=\dfrac{15429-15451}{\dfrac{546}{\sqrt{350}}}\approx-0.75

For x=15473

z=\dfrac{15473-15451}{\dfrac{546}{\sqrt{350}}}\approx0.75

The required probability :-

P(15429

Hence, the required probability is 0.5467.

3 0
3 years ago
a ferry boat leaves the dock once per hour your waiting time for the next ferry will follow a uniform distribution from 0 to 60
olga55 [171]
Ok but what is the question
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2 years ago
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