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3 years ago

14

31231802938102938x1923193819023

2 answers:

Komok [63]3 years ago

5 0

Answer:

6.006481e+28

Step-by-step explanation:

hope it helped

MA_775_DIABLO [31]3 years ago

4 0

<h2>Answer:</h2><h2>Your final answer is 6.006481e+28</h2><h2>Step-by-step explanation:</h2><h2></h2><h2>You just multiply.</h2><h2></h2><h2>Hope this helps, have a great day, stay safe, and positive.</h2><h2></h2><h2>:)</h2>

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According to the U.S. Census Bureau, 11% of children in the United States lived with at least one grandparent in 2009 (USA TODAY

wel

Answer:

The pvalue of the test is 0.0001 < 0.02, which means that we reject the null hypothesis and accept the alternate hypohteis that the proportion of all children in the United States who currently live with at least one grandparent is higher than 11%.

Step-by-step explanation:

Proportion of all children in the United States who currently live with at least one grandparent is higher than 11%

This means that the null hypothesis is:

$H_0: p = 0.11$

And the alternate hypothesis is:

$H_a: p > 0.11$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

0.11 is tested at the null hypothesis:

This means that $\mu = 0.11, \sigma = \sqrt{0.11*0.89}$

Suppose that in a recent sample of 1550 children, 214 were found to be living with at least one grandparent.

This means that:

$n = 1550, X = \frac{214}{1550} = 0.1381$

Value of the test statistic:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{0.1381 - 0.11}{\frac{\sqrt{0.11*0.89}}{\sqrt{1550}}}$

$z = 3.54$

Pvalue of the test and decision:

This is the probability of finding a sample proportion above 0.1381, which is 1 subtracted by the pvalue of Z = 3.54.

$z = 3.54$ has a pvalue of 0.9999

1 - 0.9999 = 0.0001

The pvalue of the test is 0.0001 < 0.02, which means that we reject the null hypothesis and accept the alternate hypohteis that the proportion of all children in the United States who currently live with at least one grandparent is higher than 11%.

8 0

3 years ago

Tiffany wants to calculate the volume of her globe. The globe is in the shape of a sphere. She measured the circumference of the

Elis [28]

Answer:

<h2>231in^3</h2>

Step-by-step explanation:

We know that the volume of a sphere/globe is given as

V=4 /3πr^3

but the circumference is expressed as

C=2πr

solving for r given that C=24

24=2*3.142r

24=6.284r

r=24/6.284

r=3.8in

put r=3.6 in the expression for volume we have

V=4 /3π(3.8)^3

V=4 /3π(55

V=(220.59*3.142)/3

V=693.12/3

V=231in^3

The volume of the globe is 231in^3

3 0

4 years ago

Freeeeeeee pointtsssss

Aleksandr [31]

Answer:

thank youuuuuuuuuuu sooooooo much!!!!!!!!!!!! i hope you have an amazing dayyyyyyyyy!!!!!!!!!!!!!!!!!!!!!

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

What is the equation of the line that passes through the points (2, –1) and (6, 1)?

Veronika [31]

Answer:

y = 2/4x -2

Step-by-step explanation:

8 0

3 years ago

Nikki’s bedroom is shaped like a rectangle that is 18 ¼ feet long and 12 feet wide. She wants to carpet the entire room. How man

mart [117]

Answer:

=56648685900-56565658=4646756+55768476845655685-737y57345795754549

Step-by-step explanation:

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3 years ago