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kari74 [83]
3 years ago
7

Help!!!

Mathematics
1 answer:
Anika [276]3 years ago
4 0
It is the third option y+2=-3(x-1)
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How large a sample should be selected to provide a 95% confidence interval with a margin of error of 6? Assume that the populati
marshall27 [118]

Using the z-distribution, it is found that a sample of 171 should be selected.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm z\frac{\sigma}{\sqrt{n}}

The margin of error is:

M = z\frac{\sigma}{\sqrt{n}}

In which:

  • \overline{x} is the sample mean.
  • z is the critical value.
  • n is the sample size.
  • \sigma is the standard deviation for the population.

For this problem, the parameters are:

z = 1.96, \sigma = 40, M = 6

Hence we solve for n to find the needed sample size.

M = z\frac{\sigma}{\sqrt{n}}

6 = 1.96\frac{40}{\sqrt{n}}

6\sqrt{n} = 40 \times 1.96

\sqrt{n} = \frac{40 \times 1.96}{6}

(\sqrt{n})^2 = \left(\frac{40 \times 1.96}{6}\right)^2

n = 170.7.

Rounding up, a sample of 171 should be selected.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

4 0
2 years ago
216.666 / 1- (1.0054)-120
Orlov [11]

Answer:

The answer is 95.6606

Step-by-step explanation:

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3 years ago
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What is the distance between -25 and 15 on the number line?
Vsevolod [243]

Answer:

10

Step-by-step explanation:

Because is if u count nicely u will see that

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A group of 45 students went to the space museum. Tickets cost $11 for each
Eddi Din [679]

your answer is 495 dollars. as 45 times 11 equals 495 being the 45 is students and 11 is price

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Compute 941 divided by 8 Enter your answer using remainder notation, if necessary. For example: 29R2
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Answer:

Step-by-step explanation:

hello :

941 = 8 ×117+5

the remainder is 5

Writing in remainder notation would have 941/8 = 117 R 5

3 0
4 years ago
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