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Liula [17]
1 year ago
7

Is shape A congruent to shape 82BA

Mathematics
1 answer:
NeTakaya1 year ago
7 0

Solution

For this case the answer would be:

yes

And the reason is because we have the same shape and with the smae structure so then are congruent

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the student council published the results of the survey about The new school mascot. Jesse spilled water on the paper, but he kn
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Which expresión represents, five times the quotient of two numbers?
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Let the numbers be m and n.  Then "<span>five times the quotient of two numbers" would be 5m/n.

</span>
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If you doubled the radius of a sphere, how would the volume change? A. The volume would double. B. The volume would triple. C. T
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Find the hypotenuse of a right triangle that has one side of 7 cm and another<br> one of 3 cm.
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Read 2 more answers
The Information Technology Department at a large university wishes to estimate the proportion of students living in the dormitor
nadya68 [22]

Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.05}{1.96})^2}=384.16  

And rounded up we have that n=385

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".  

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. And the critical value would be given by:

z_{\alpha/2}=-2.58, z_{1-\alpha/2}=2.58

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.05 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

We can use as an estimator for p \hat p =0.5. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.05}{1.96})^2}=384.16  

And rounded up we have that n=385

3 0
3 years ago
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