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olga2289 [7]
3 years ago
12

Please help asap! Ill give the crown!

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
8 0

Answer:

Step-by-step explanation:

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Step-by-step explanation: -6.80 + 6.80

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Step-by-step explanation:

apply the indices law

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A simple random sample of 64 observations was taken from a large population. The population standard deviation is 120. The sampl
jeka94

Answer:

<h3>The standard error of the mean is <u>15</u></h3>

Step-by-step explanation:

Given that a simple random sample of 64 observations was taken from a large population.

Hence it can be written as n=64

The population standard deviation is 120.

It can be written as \sigma_{\overline{X}}=120

The sample mean was determined to be 320.

It can be written as \overline{X}=\mu =320

<h3>To find the standard error of the mean :</h3>

The formula for the standard error of the mean is given by

\sigma_{\overline{X}}=\frac{\sigma}{\sqrt{n}}

Now substitute the values in the formula we get

\sigma_{\overline{X}}=\frac{120}{\sqrt{64}}

=\frac{120}{8}

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\sigma_{\overline{X}}=15

<h3>∴ The standard error of the mean is 15</h3>
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