All categories

2 years ago

Please help me! ——————————

Mathematics

1 answer:

Lelechka [254]2 years ago

7 0

Answer:

msksk1928728(192773)22881288296;+512166:+

You might be interested in

Carlos is using a number line to add another integer to –4. He begins by showing –4 on the number line, as shown below. Carlos a

Serhud [2]

<span>I had the same question on my quiz
The answer is that The number could be 3 or any integer less than 3.</span>

7 0

3 years ago

Read 2 more answers

A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the

Lubov Fominskaja [6]

Answer:

The required sample size for the new study is 801.

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:

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

25% of all adults had used the Internet for such a purpose

This means that $\pi = 0.25$

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 $Z = 1.96$ .

What is the required sample size for the new study?

This is n for which M = 0.03. So

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

$0.03 = 1.96\sqrt{\frac{0.25*0.75)}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.25*0.75}$

$\sqrt{n} = \frac{1.96\sqrt{0.25*0.75}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.25*0.75}}{0.03})^2$

$n = 800.3$

Rounding up:

The required sample size for the new study is 801.

4 0

2 years ago

What is the distance between two points(2,-6)(-7,1)

Ilia_Sergeevich [38]

Answer:

11.4

Step-by-step explanation:

Find the distance in the x-direction between the x-components: 2 - (-7) = 9.

Similarly: between the y-components: 1 - (-6) = 7

Apply the Pythagorean Theorem: 9^2 + 7^2 = d^2, where d is the desired distance:

81 + 49 = d^2, or d^2 = 130

The distance d is approximately √130 ≈ 11.4

3 0

2 years ago

Read 2 more answers

What is 5/98 in distributive property

miv72 [106K]

The answer is 5÷90+8 and that's the answer does the answer

7 0

3 years ago

the sponsor of a concert promises the concert singer a fee based on $5 per person in the audience. if attendence is below 200, h

larisa86 [58]

This would help you alot.

3 0

3 years ago

Read 2 more answers