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3 years ago

WILL MARK BRAINLIEST

Mathematics

1 answer:

miv72 [106K]3 years ago

7 0

Divide 50 by 2 so 25 then divide that by 2 so 12.5 =x

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Step-by-step explanation:

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2 years ago

What does equivalent mean in math

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3 years ago

Read 2 more answers

How many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? We want 98

Irina18 [472]

Answer:

$n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67$

So the answer for this case would be n=67 rounded up

Step-by-step explanation:

Information given

$\bar X$ represent the sample mean for the sample

$\mu$ population mean

$\sigma=1400$ represent the sample standard deviation

n represent the sample size

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =400 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And the critical value would be $z_{\alpha/2}=2.33$ , replacing into formula (b) we got:

$n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67$

So the answer for this case would be n=67 rounded up

8 0

3 years ago

-25+t=-44 solve. Use the addition principle to find solution. T=

Taya2010 [7]

To find T, you add 25 to both sides, isolating the varible. This gives you T=-19

Hope this helped!

4 0

3 years ago

Select the correct answer.

SSSSS [86.1K]

Ahah coco die sucks math

4 0

2 years ago