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vaieri [72.5K]
3 years ago
11

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?
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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
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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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3 years ago
$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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Read 2 more answers
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
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D

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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