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3 years ago

Find two consecutive even intergers whose sum is 34

Mathematics

1 answer:

Daniel [21]3 years ago

3 0

Ask safari it gives you the best answer

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Answer:

The answer is G

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3 years ago

Read 2 more answers

A researcher wishes to estimate with 95% confidence, the proportion of the people who own a home computer. A previous study show

vitfil [10]

Answer:

The minimum sample size necessary is 2305.

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:

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

For this problem, we have that:

$\pi = 0.4$

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 $Z = 1.96$ .

The researcher wishes to be accurate within 2% of the true proportion. Find the minimum sample size necessary?

We need a sample size of n.

n is found when M = 0.02. So

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

$0.02 = 1.96\sqrt{\frac{0.4*0.6}{n}}$

$0.02\sqrt{n} = 1.96*\sqrt{0.4*0.6}$

$\sqrt{n} = \frac{1.96*\sqrt{0.4*0.6}}{0.02}$

$(\sqrt{n})^{2} = (\frac{1.96*\sqrt{0.4*0.6}}{0.02})^{2}$

$n = 2304.96$

Rounding up

The minimum sample size necessary is 2305.

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3 years ago

A group of birds are flying, they meet another group of birds. They ask 'hello hundred.' They replied we are not 100. we need ha

Pani-rosa [81]

Answer:

Step-by-step explanation:

You answer

5 0

2 years ago

2y + x = -15 , x=3y substitution method

Bas_tet [7]

Answer:

x = -9, y = -3.

As an ordered pair it is (-9, -3).

Step-by-step explanation:

Substitute x = 3y in equation 1:

2y + 3y = -15

5y = -15

y = -15/5

y = -3.

Now find x by plugging y = -3 in x = 3y:

x = 3*-3 = -9.

Check the answer in equation 1:

2(-3) + -9

= -6 - 9

= -15 Correct.

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4 years ago

(8+r)4<br>It's simple but I wanna check if my messy self is actually right lol

vitfil [10]

Answer:

the answer to this will be 32+4r if you simplify

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3 years ago