All categories

3 years ago

Please help thank you very much

Mathematics

1 answer:

-BARSIC- [3]3 years ago

7 0

Hello!

The answer is 34°

Hope this helps!

You might be interested in

PTC is a substance that has a strong bitter taste for some people and is tasteless for others. The ability to taste PTC is inher

lana66690 [7]

Answer:

a) $n=\frac{0.76(1-0.76)}{(\frac{0.01}{1.64})^2}=4905.83$

And rounded up we have that n=4906

b) For this case since we don't have prior info we need to use as estimatro for the proportion $\hat p =0.5$

$n=\frac{0.5(1-0.5)}{(\frac{0.01}{1.64})^2}=6724$

And rounded up we have that n=6724

Step-by-step explanation:

We need to remember that the confidence interval for the true proportion is given by :

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

Part a

The estimated proportion for this case is $\hat p =0.76$

Our interval is at 90% of confidence, and the significance level is given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . The critical values for this case are:

$z_{\alpha/2}=-1.64, t_{1-\alpha/2}=1.64$

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)

The margin of error desired is given $ME =\pm 0.01$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

Replacing we got:

$n=\frac{0.76(1-0.76)}{(\frac{0.01}{1.64})^2}=4905.83$

And rounded up we have that n=4906

Part b

For this case since we don't have prior info we need to use as estimatro for the proportion $\hat p =0.5$

$n=\frac{0.5(1-0.5)}{(\frac{0.01}{1.64})^2}=6724$

And rounded up we have that n=6724

3 0

3 years ago

Find the product. 2y 2(3x + 5z) 5xy 2 + 7y 2z 6xy 2 + 10y 2z 2 6xy 2 + 10y 2z

Illusion [34]

120
x
2
y
2
+
848
x
y
2
z
+
20
y
z

7 0

3 years ago

1. Which equation is the inverse of y = 2x2 + 25 ?

Alborosie

Imma go with F just because I think it’s right

3 0

3 years ago

Two addends

nataly862011 [7]

Answer:

Step-by-step explanation:

18+6+4=28

8 0

3 years ago

Mo wrote and solved the equation below to find the cost per magnet.<br> 66.25w=795<br> W=12

crimeas [40]

? what are you trying to find

5 0

3 years ago

Read 2 more answers