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3 years ago

Someone please help 5 points.

Mathematics

2 answers:

choli [55]3 years ago

4 0

Answer:

7.1 I am pretty sure okay cya

svetlana [45]3 years ago

4 0

Answer:

7.81

Step-by-step explanation:

using distance formula d√(x1 - x2)^2 + (y2 - y1)^2

√(9 - 3)^2 + (7 - 2)^2

√36 + 25

√61 = 7.810

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bagirrra123 [75]

Answer:

A sample of 18 is required.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

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

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

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3 years ago

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Answer:

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