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3 years ago

Can you guys help me with this answer will get brainliest

Mathematics

2 answers:

juin [17]3 years ago

8 0

Answer:

help with wat

Step-by-step explanation:

tigry1 [53]3 years ago

6 0

Answer:

what is the question

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, what is the radius of a circle with circumference 37.7 m?

neonofarm [45]

Answer: r≈6

Step-by-step explanation: Using the formula

C=2πr

Solving forr

r=C

2π=37.7

2·π≈6.00014

8 0

3 years ago

Read 2 more answers

3. Using the sample size of 800 and the proportion 0.47, calculate the margin of error associated with the estimate of the propo

salantis [7]

Answer:

$ME=1.96\sqrt{\frac{0.47 (1-0.47)}{800}}=0.0346$

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

We assume for this case a confidence level of 95%. 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:

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

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

And if we replace the values obtained we got this:

$ME=1.96\sqrt{\frac{0.47 (1-0.47)}{800}}=0.0346$

6 0

3 years ago

3. Fill in the blanks with center, circle, directrix, focus, line, parabola, or radius.

anzhelika [568]

A ___line___ is the set of all points that are equidistant from two points.

A ___circle___ is the set of all points that are equidistant from a given point. The given point is called the ____center____. The segment showing the distance is called the ____radius____.

A ___parabola____ is the set of all points equidistant from a single point and a single line. The single point is called the ____focus____ and the single line is called the ____directix_____.

6 0

3 years ago

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Solve x^2 4x − 12 = 0. x = 2, x = −6 x = −2, x = −6 x = 3, x = −4 x = −3, x = 4

Svetlanka [38]

I hope this helps you