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4 years ago

Use the net to determine the total surface area

Mathematics

2 answers:

Aleksandr-060686 [28]4 years ago

6 0

No net where is the picture

Brut [27]4 years ago

3 0

Answer:

I need to see the net

Step-by-step explanation:

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A random sample of 400 Michigan State University (MSU) students were surveyed recently to determine an estimate for the proporti

Gre4nikov [31]

Answer:

a. .92

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error of the interval is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

The lower bound is the point estimate $\pi$ subtracted by the margin of error.

The upper bound is the point estimate $\pi$ added to the margin of error.

Point estimate:

The confidence interval is symmetric, so it is the mean between the two bounds.

In this problem:

$\pi = \frac{0.372 + 0.458}{2} = 0.415$

Sample of 400, which means that $n = 400$

Margin of error is the estimate subtracted by the lower bound. So $M = 0.415 - 0.372 = 0.043$

We have to find z.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.043 = z\sqrt{\frac{0.415*0.585}{400}}$

$z = \frac{0.043\sqrt{400}}{\sqrt{0.415*0.585}}$

$z = 1.745$

$z = 1.745$ has a pvalue of 0.96.

This means that:

$1 - \frac{\alpha}{2} = 0.96$

$\frac{\alpha}{2} = 1 - 0.96$

$\frac{\alpha}{2} = 0.04$

$\alpha = 0.08$

Confidence level:

$1 - \alpha = 1 - 0.08 = 0.92$

So the correct answer is:

a. .92

7 0

3 years ago

Michael has 567 pennies, Jorge has 464 pennies, and Jamie has 661 pennies. If the pennies are shared equally by the 3 boys and 3

GuDViN [60]

Answer:

Everybody, including the three boys, will get 47 pennies.

Step-by-step explanation:

First, you add the number of pennies each of the boys has, 567+464+661 = 1,692. Then you take the 1,692 and divide it by 36 to get 47. You divide by 36 because the pennies are getting shared by the 3 boys and 33 classmates, which comes out to be 36 classmates in total.

3 0

4 years ago

EASY MIDDLE SCHOOL MATH!!!

elena-14-01-66 [18.8K]

Answer:

18 boys

Step-by-step explanation:

18=6x3

6x4=24

24+18=42

8 0

3 years ago

Determine whether the underlined number describes a population parameter or a sample statistic. Explain your reasoning. Modifyin

torisob [31]

Answer:

Step-by-step explanation:

8 0

4 years ago

(1,000,000) + (3,00,000) + (60,000)+(2,000) + (700)+( 40)+8

Anna11 [10]

Step-by-step explanation:

________________________________________________________________

$(1,000,000) + (3,00,000) + (60,000)+(2,000) + (700)+( 40)+8 \\ = 1300000 + 62000 + 740 + 8 \\= 1362000 + 748 \\= 1362748$

________________________________________________________________

hope it helped you:)

6 0

3 years ago