3 years ago

Please answer quick I’ll mark you brainliest pls the quarter ends at 12:00

Mathematics

1 answer:

Gala2k [10]3 years ago

5 0

Answer:

46/100

Step-by-step explanation:

also what grade is this

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A population has a standard deviation of 5.5. What is the standard error of the sampling distribution if the sample size is 81?

VladimirAG [237]

Answer:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

$\bar X \sim N(\mu ,\frac{\sigma}{\sqrt{n}})$

And the standard error would be:

$\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}$

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

Step-by-step explanation:

For this case we know the population deviation given by:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

$\bar X \sim N(\mu ,\frac{\sigma}{\sqrt{n}})$

And the standard error would be:

$\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}$

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

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3 years ago

Factor the polynomial: 81b^2 - 64c^2

Lilit [14]

Answer:

160D^2

Step-by-step explanation:

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3 years ago

The distance between -18 and 15 is equal to_______

ArbitrLikvidat [17]

Answer:

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$83.5743 rounded to the nearest cent is

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83.57 i believe because you would round the 43 down so it would stay the same

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If the side lengths of a cube are 15 feet, what is the correct way to write the expression to represent the volume of the cube i

Oksi-84 [34.3K]

Answer:

Step-by-step explanation:

A cube is something that has the same length on all sides, so therefore, multiplying one of the side lengths by 3 gets you the answer.

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