2 years ago

I don't understand how this works

Mathematics

1 answer:

Bingel [31]2 years ago

8 0

Answer:

The commutive property used twice, once on each of the two multiplication

The commutive property is where you can be able to switch around the numbers to multiply the problem to get your solution.

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Data on the blood cholesterol levels of 6 rats give mean = 85, s= 12. A 95% confidence interval for the mean blood cholesterol o

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The correct answer is:

c)75.4 to 94.6

Explanation:

The formula for a confidence interval is:

$\mu \pm z*(\frac{\sigma}{\sqrt{n}})$ ,

where μ is the mean, z is the z-score associated with the level of confidence we want, σ is the standard deviation, and n is the sample size.

Our mean is 85, our standard deviation is 12, our sample size is 6, and since we want 95% confidence, our z-score is 1.96:

$85\pm 1.96(\frac{12}{\sqrt{6}})=85\pm 9.6=85-9.6, 85+9.6=75.4, 94.6$

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How many 5-millimeter-long spiders would it take to make a line of spiders 1 meter long?

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