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EleoNora [17]
3 years ago
7

I will mark brainliest answer quickly

Mathematics
1 answer:
Westkost [7]3 years ago
3 0

Answer:

D

Step-by-step explanation:

please i want brainliest

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Margin of error of 0.0485 hours.

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, find the margin of error M as such

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

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