HELP?<br><br> What percent of 33 is 99?<br><br> 30%<br> 33.3%<br> 200%<br> 300%

A down payment of $195 is made on a television that costs $1300. What percent of the

Stells [14]

6.66666667% I hope that is helpful to you

3 0

3 years ago

URGENT: statistics: A researcher wishes to estimate the percentage of adults who support abolishing the penny what size sample s

irina1246 [14]

Using the margin of error for the z-distribution, the sample sizes are given as follows:

a) 822.

b) 1068.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

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

The margin of error is given by:

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

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

We have a 95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so the critical value is z = 1.96.

Item a:

The estimate is of $\pi = 0.26$ , hence we solve for n when M = 0.03.

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

$0.03 = 1.96\sqrt{\frac{0.26(0.74)}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.26(0.74)}$

$\sqrt{n} = \frac{1.96\sqrt{0.26(0.74)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{1.96\sqrt{0.26(0.74)}}{0.03}\right)^2$

n = 821.2

A sample of 822 is needed.

Item b:

No prior estimate, hence $\pi = 0.5$ .

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

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

$0.03\sqrt{n} = 1.96\sqrt{0.5(0.5)}$

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

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

n = 1067.11

A sample of 1068 is needed.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

4 0

2 years ago

Look at the image to answer.

Katen [24]

The correct answer is D

since 3.2222... is a repeating number, it is rational

0.112123123412345 is not repeating and doesn't have a cosistent pattern, so it isn't rational

1.589 is rational because this decimal stops and doesn't continue- it can also be written as a fraction ( $\frac{1589}{1000}$ )

8 0

4 years ago

Please help with the problem in the image!<br> (Dont answer if you don't know it)

Snowcat [4.5K]

Here is the answer , please mark brainelist

7 0

3 years ago

Solve. Reduce answers to lowest terms. Simplify improper fractions as mixed numbers.

serious [3.7K]

5 5/6 becomes the mixed number 35/6, and 2 2/3 becomes the mixed number 8/3, which can be rewrittten as 16/6.
3*17
Then: 35/6 + 16/6 = 51/6 = ---------- = 17/2 (answer)
3 * 2

3 0

3 years ago

HELP? What percent of 33 is 99? 30% 33.3% 200% 300%