All categories

2 years ago

Anyone know the answer to this geometry question?

Mathematics

1 answer:

Alina [70]2 years ago

8 0

I believe you do the bottom times middle divided by two

You might be interested in

Which statements are true for the following expression? (9 + 3) · 4

ss7ja [257]

Answer:

12 x 4 or 48

Step-by-step explanation:

6 0

2 years ago

At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.03 for the estimation of a population pro

Gnom [1K]

Answer:

A sample of 1068 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.03 for the estimation of a population proportion?

We need a sample of n.

n is found when M = 0.03.

We have no prior estimate of $\pi$ , so we use the worst case scenario, which is $\pi = 0.5$

Then

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.03\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.03}$

$(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.03})^{2}$

$n = 1067.11$

Rounding up

A sample of 1068 is needed.

8 0

2 years ago

Can anyone help me pweeezzzz

hammer [34]

Answer:

what are you answers ?

5 0

2 years ago

Read 2 more answers

Is -1.2 a rational number

Taya2010 [7]

Answer:

I don't think so

Step-by-step explanation:

5 0

2 years ago

What is the largest number that can be rounded to 2,500 when rounded to the nearest ten?

n200080 [17]

I think it is 2,504.
when you round 2,505 it comes out to 2,510.

8 0

2 years ago