2 years ago

When you realize you have this one week to get your work done before you fail but your on brainly instead.....

Mathematics

1 answer:

Andrej [43]2 years ago

5 0

Answer:

same for me too here loll

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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:

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

4 0

2 years ago

3) Find the length of a rectangular lot with a perimeter of 92 m if the length is 8 m more than

Nikolay [14]

Answer:

26 m

Step-by-step explanation:

Perimeter = 92 m

Length = 8 m more than width

Width: 20 m

Therefore,

<h2>length=26 m</h2>

4 0

2 years ago

What is 7 1/5 - 6 2/5 =?

poizon [28]

Answer:

0.8

Step-by-step explanation:

7 1/5 - 6 2/5 = 0.8

5 0

2 years ago

What is the surface area of the figure?

Whitepunk [10]

The answer i c,because if u sum it up,u get that

3 0

2 years ago

A middle school has 600 students and 34% of them are in the 8th grade. One-fourth of 8th graders walk to school. How many 8th gr

Kaylis [27]

600 * .34 = 204 are in 8th grade

204 * 1/4 = 51 51 8th graders walk to school

5 0

2 years ago

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