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patriot [66]
2 years ago
10

Can someone help me please?

Mathematics
1 answer:
ANTONII [103]2 years ago
4 0

Answer:

ok i help you 11.28-99 is

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Find the minimum sample size necessary to be 99% confident that the population mean is within 3 units of the sample mean given t
SVEN [57.7K]

Answer:

The minimum sample size required is 207.

Step-by-step explanation:

The (1 - <em>α</em>) % confidence interval for population mean <em>μ</em> is:

CI=\bar x\pm z_{\alpha /2}\frac{\sigma}{\sqrt{n}}

The margin of error of this confidence interval is:

MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}

Given:

MOE=3\\\sigma=29\\z_{\alpha /2}=z_{0.01/2}=z_{0.05}=2.576

*Use a <em>z</em>-table for the critical value.

Compute the value of <em>n</em> as follows:

MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}\\3=2.576\times \frac{29}{\sqrt{n}} \\n=[\frac{2.576\times29}{3} ]^{2}\\=206.69\\\approx207

Thus, the minimum sample size required is 207.

3 0
3 years ago
The sum of the three interior angles of any triangle equal 180 degrees. One right triangle has one acute angle of 30 degrees.
ELEN [110]

Answer: right triangle is a triangle with one angle equal 90. That being said, the total of all angles = 180. 1 of them is 90 which makes the sum of the 2 acute angles = 90. One acute angle = 30 => the second one = 90 - 30 = 60 degree

Step-by-step explanation:

6 0
3 years ago
Anyone know this one
Alecsey [184]

Answer:

Only B

Step-by-step explanation:

Did this in Khan Academy.

=> Also, there are 2 '-' symbols in the question.

In Option A, there is only 1 "-' symbol.

In Option B, there are 2 '-' symbols.

Option C says none of the above.

Since, Option B has 2 '-' symbols, it is the correct.

5 0
4 years ago
Help I need somebody help not just anyboddyyayyayaya
olganol [36]

Answer:

12:3/4, 3:3/16, 6:3/8

Step-by-step explanation:

12:3/4

by dividing that by 4, 3:3/16

by multiplying that by 2, 6:3/8

6 0
3 years ago
Read 2 more answers
Pleaseeee help!!!! I will mark you as brainlinest for correct answer!!!!
pshichka [43]
Yes, your answer is correct.
5 0
3 years ago
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