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yulyashka [42]
3 years ago
15

On our way to physical her parents Jennifer drives 265 miles in five hours what is her average rate of ace of speed in miles per

hour
Mathematics
1 answer:
OleMash [197]3 years ago
6 0
The answers is 53
Cause you gotta do 265 divided by 5
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The answer is yes to both questions. Leah could write down 3/4 and 1/4 which would equal 1, but she could also write down 7/8 and 5/8 which is greater than 1. 
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In a large population, 82% of the households have cable tv. A simple random sample of 225 households is to be contacted and the
anzhelika [568]

Answer:

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For proportions, the mean is \mu = p and the standard deviation is s = \sqrt{\frac{p(1-p)}{n}}

In this problem, we have that:

p = 0.82, n = 225.

So

\mu = 0.82

s = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.82*0.18}{225}} = 0.0256

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

7 0
3 years ago
Read 2 more answers
COMPLETE
Xelga [282]
It’s obvious. X Delmar practiced more
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3 years ago
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It is known that 10% of the items produced by a certain machine end up having a flaw. If we select 7 items from the production l
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Step-by-step explanation:

p = 0.1, q = 0.9, n = 7

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b) Use binomial probability.

P = nCr pʳ qⁿ⁻ʳ

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P(3) = 0.023

6 0
3 years ago
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