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erastova [34]
3 years ago
10

`Geometry Question 1 thxx

Mathematics
1 answer:
Mrrafil [7]3 years ago
8 0

Answer:

b) all interior angles are right angles

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In early 2012, the Pew Internet and American Life Project asked a random sample of U.S. adults, "Do you ever ... use Twitter or
8090 [49]

Answer:

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

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

And the confidence interval is given by:

(0.123, 0.177)

And for this case the interval contains the value 0.16, so then we can conclude at 5% of significance that the true proportion is not different from 0.16

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".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

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

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

And the confidence interval is given by:

(0.123, 0.177)

And for this case the interval contains the value 0.16, so then we can conclude at 5% of significance that the true proportion is not different from 0.16

3 0
3 years ago
I’m confused. lol. Pls help
AlexFokin [52]

Answer:

(-3,1) dhdjdjdjdjejdhdjehehdhdjddjdjddh

(-3,1)

3 0
3 years ago
Add the polynomials.<br> (3x3 - 3x2 - 4x + 9) +(6x2 +7x - 5)
bixtya [17]

Answer:

3x +19

Step-by-step explanation:

(9-6-4x+9)+(12+7x-5)

(12-4x)+(7+7x)

3x+19

6 0
2 years ago
Write in factored form<br> m^2 - n^4
Evgesh-ka [11]

The answer is : \left(m+n^2\right)\left(m-n^2\right)

Here are the steps below to help you! ^^

8 0
2 years ago
If the project is finished within 26 weeks of its start, the project manager will receive a bonus of $1,000; and if the project
denpristay [2]

Answer:

Probability of finishing within 26 weeks of start and earning $ 1000 bonus = 46%

Probability of finishing within 27 weeks of start and earning $ 500 bonus = 69.23%

Step-by-step explanation:

3 0
3 years ago
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