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3 years ago

Number 4 plz and thank u

Mathematics

1 answer:

Ray Of Light [21]3 years ago

4 0

Answer:

22 weeks

Step-by-step explanation:

it is 22 weeks because if you divide 39 by 2 then it is 19.5 and if you divide 429 by 19.5 you will get 22 hope this helps.

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Claim: Most adults would erase all of their personal information online if they could. A software firm survey of randomly selec

pychu [463]

Answer:

Test statistic = 3.863

Step-by-step explanation:

We are told that most adults would erase all of their personal information online if they could. Since the word "most" is used, it means more than 50% or 50 percent.

So, p_o = 0.5

Also, we are told that 58 % of them would erase all of their personal information online if they could.

Thus, p^ = 0.58

Number of randomly selected adults; n = 583

The test statistic formula for hypothesis test for proportion is given by:

z = (p^ - p_o)/[√[p_o(1 - p_o)/n]

Plugging in the relevant values, we have;

z = (0.58 - 0.5)/[√[0.5(1 - 0.5)/583]

z = 0.08/0.02070788416

z = 3.863

8 0

3 years ago

My brain do be dead. I'm trying to catch up in my math class before Christmas. Any help I can get would be SO APPREICTATED AAA

soldier1979 [14.2K]

Answer:

x=3

Step-by-step explanation:

for 17.

we have that x=8 as one solution

then we have

x-8=0

so we know that

$f(x)=(x-8)(something)$

$\frac{f(x)}{x-8}=something$

so we divide and get that

$something = x^{2} -6x+9x$

and we can factor it as

$(x-3)(x-3)$

so the other solutions are

x-3 =0

x = 3

this is a normal division

3 0

3 years ago

Read 2 more answers

Geneva rode her bike a total of 2 1/2 miles from her house to school. First she rode 4/5 mile from her house to the park. Then s

Sonja [21]

Add 4/5 and 1/5 to make 5/5 or 1 mile the subtract 1 from 2 1/2 to equal 1 1/2 miles

8 0

4 years ago

Helpp lang pooo di ko alam eh..<br>A.P po subject

docker41 [41]

Answer:

I can't answer this I don't know this language-

8 0

3 years ago

What is the formula for a confidence interval?

ikadub [295]

Answer:

a) The formula is given by mean $\pm$ the margin of error. Where the margin of error is the product between the critical value from the normal standard distribution at the confidence level selected and the standard deviation for the sample mean.

b) $\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

If the distribution for X is normal or if the sample size is large enough we know that the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

Part a

The formula is given by mean $\pm$ the margin of error. Where the margin of error is the product between the critical value from the normal standard distribution at the confidence level selected and the standard deviation for the sample mean.

Part b

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$

5 0

4 years ago