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mixer [17]
2 years ago
10

How Do You Do The Math Questions

Mathematics
1 answer:
Ray Of Light [21]2 years ago
7 0
1.A 2.B hope this helps
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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
2 years ago
Area sheet 3!! Need asp!!
Sergeu [11.5K]

1) 24 square cm

2) 35 square cm

3) 9 square cm

4) 40 square cm

5) 18 square cm

6) 40 square cm

to find the area of a rectangle, all you have to do is multiply the length by the width.

5 0
2 years ago
Read 2 more answers
X-1<br> 1<br> X+4<br> +<br> 2x+1<br> =<br> x-2<br> 2x²-3x-2
kiruha [24]

Answer:

x = 2π3

Step-by-step explanation:

csc(x)csc(x) , x=πx=π

3x+2y+zx+y+z3x+2y+zx+y+z , x=2x=2 , y=3y=3 , z=1z=1

cot(3x)cot(3x) , x=2π3

Hope this helps :)

8 0
3 years ago
Electron groups could be considered which of the following?
Yanka [14]
Im pretty sure D bonded pair of electrons is the answer
6 0
2 years ago
Line k perpendicular to line m, and passes through the same point, (6,2). What is the equation
Papessa [141]

Answer:

y = mx + b

Step-by-step explanation:

Use that form to find the slope.

8 0
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