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4 years ago

Hellllp pleaseeeee !

Mathematics

2 answers:

pogonyaev4 years ago

6 0

Yes it is congruent

Irina18 [472]4 years ago

3 0

Yes it is congruent because they are identical to each other

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Determine which of the following points lies on the line y= 5/4 x + 2

Katyanochek1 [597]

The point (4,7) is the only one that can be plugged into the equation and work. in this case when 4 is plugged in as X & Y is plugged in at 7 we get that 7=7, which is a true statement.

3 0

3 years ago

Repeated student samples. Of all freshman at a large college, 16% made the dean’s list in the current year. As part of a class p

Dima020 [189]

Answer:

a) p-hat (sampling distribution of sample proportions)

b) Symmetric

c) σ=0.058

d) Standard error

e) If we increase the sample size from 40 to 90 students, the standard error becomes two thirds of the previous standard error (se=0.667).

Step-by-step explanation:

a) This distribution is called the sampling distribution of sample proportions (p-hat).

b) The shape of this distribution is expected to somewhat normal, symmetrical and centered around 16%.

This happens because the expected sample proportion is 0.16. Some samples will have a proportion over 0.16 and others below, but the most of them will be around the population mean. In other words, the sample proportions is a non-biased estimator of the population proportion.

c) The variability of this distribution, represented by the standard error, is:

$\sigma=\sqrt{p(1-p)/n}=\sqrt{0.16*0.84/40}=0.058$

d) The formal name is Standard error.

e) If we divided the variability of the distribution with sample size n=90 to the variability of the distribution with sample size n=40, we have:

$\frac{\sigma_{90}}{\sigma_{40}}=\frac{\sqrt{p(1-p)/n_{90}} }{\sqrt{p(1-p)/n_{40}}}}= \sqrt{\frac{1/n_{90}}{1/n_{40}}}=\sqrt{\frac{1/90}{1/40}}=\sqrt{0.444}= 0.667$

If we increase the sample size from 40 to 90 students, the standard error becomes two thirds of the previous standard error (se=0.667).

0 0

3 years ago

How many integers between 1 and 40 are multiples of 3 and 7

Elis [28]

3 goes in to 40 13 times 7 goes in to 40 5 times but it is not 13+5 because you do not want to count 21 twice

4 0

3 years ago

Cory can eat 21 boiled eggs in 6 minutes. He wants to know how many minutes (m) it would take him to eat 35 boiled eggs if he ca

kipiarov [429]

Answer:c

Step-by-step explanation:

3 0

3 years ago

The volume of a cylinder is 980 pi The height of the cylinder is 20 in. What is the radius of the cylinder?

AlexFokin [52]

█ Question █

The volume of a cylinder is 980 pi The height of the cylinder is 20 in. What is the radius of the cylinder?

█ Explanation █

We know the volume of the cylinder and the height, too. We are looking to find the radius. Do the following equation that is posted in the screenshot.

Answer: The radius is 7

Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia

7 0

3 years ago