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3 years ago

7

I need heelp solving plzz

1 answer:

Nonamiya [84]3 years ago

3 0

Answer:

The anser is 5 hop this helps sorry if it is wrong

Step-by-step explanation:

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Help me, please !!!!!!!!!

Flura [38]

They did make the same color

7 0

3 years ago

One person wants to get a 95% z-confidence interval with a margin of error of at most 15 based on a population standard deviatio

Bess [88]

Answer:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

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

$\mu$ population mean

$\sigma=60$ represent the population standard deviation

n represent the sample size (variable of interest)

Confidence =95% or 0.95

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

And on this case we have that ME =15, and we are interested in order to find the value of n, if we solve n from equation (1) we got:

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

The critical value for 95% of confidence interval is provided, $z_{\alpha/2}=1.96$ , replacing into formula (2) we got:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

6 0

3 years ago

Tiana takes 3 hours to drive to the coast without stopping. How many minutes will it take her to reach the coast if she stops to

nika2105 [10]

3 hours is 180 minutes.

She rested for 20 additional minutes, thus it will take her 200 minutes.

8 0

3 years ago

Read 2 more answers

The condition proves that triangle ABC and triangle EFG are congruent by the SAS criterion. If AB does not equal EF the criterio

andrezito [222]

If AB ≠ EF, the criterion for congruency is violated. In this situation, angle C angle G are not equal :
angle C ≠ angle G

5 0

3 years ago

What’s the area of the rhombus?

miskamm [114]

Answer:

65ft² i guess

Step-by-step explanation:

using area of rombus diagonal=½*d1*d2

4 0

4 years ago