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3 years ago

8

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1 answer:

Vlada [557]3 years ago

8 0

Answer:

-1,3,5,9is a required answer.

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A chicken is born weighing 1 ounce. It gains 2 ounces each week.

Sindrei [870]

Answer:

<em>y = 1 + 2x</em>

<em>or</em>

<em>y = 2x + 1</em>

Step-by-step explanation:

I hope this helps!

Let <em>"x"</em> represent the chicken's age.

<em>"Y</em> "demonstrates the ounces.

8 0

3 years ago

Of 1000 randomly selected cases of lung cancer, 823 resulted in death within 10 years.

Arada [10]

Answer:

a) $0.823 - 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.799$

$0.823 + 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.847$

The 95% confidence interval would be given by (0.799;0.847)

b) $n=\frac{0.823(1-0.823)}{(\frac{0.03}{1.96})^2}=621.79$

And rounded up we have that n=622

c) $n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11$

And rounded up we have that n=1068

Step-by-step explanation:

Part a

$\hat p=\frac{823}{1000}=0.823$

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:

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

If we replace the values obtained we got:

$0.823 - 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.799$

$0.823 + 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.847$

The 95% confidence interval would be given by (0.799;0.847)

Part b

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 on this case we have that $ME =\pm 0.03$ 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)

And replacing into equation (b) the values from part a we got:

$n=\frac{0.823(1-0.823)}{(\frac{0.03}{1.96})^2}=621.79$

And rounded up we have that n=622

Part c

$n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11$

And rounded up we have that n=1068

5 0

3 years ago

Debra walks3.5 km every day. How far does she walk in 7 days? Write answer in meters.

11111nata11111 [884]

Answer:

Simple math. 7 times 3.5 KM, you get 24.5 KM .

Step-by-step explanation:

4 0

3 years ago

P (x) = - 2/3x^2 compare the graph of f (x) = x ^2

Afina-wow [57]

Answer:

p(x) is reflected over the x axis and is shrunken vertically by a factor of 2/3.

Step-by-step explanation:

Hope this helps.

5 0

3 years ago

Help answer this for me it will help i will give u extra points

Agata [3.3K]

Answer:

600

Step-by-step explanation:

120/500=.24

2500 × .24=600

5 0

3 years ago