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3 years ago

40+55h=190 (What is h)

Mathematics

1 answer:

Morgarella [4.7K]3 years ago

6 0

55h + 40 = 190.
55h = 150.
h = 2.73

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Answer:

The sample mean is

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The margin of error is

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Deep explanation about a confidence interval

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

$\alpha = \frac{1-0.9}{2} = 0.05$

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In this problem:

The deep explanation is not that important.

We just have to recognize that the interval has a lower end and an upper end. The distance from both the upper and the lower end to the mean is M. This means that the sample mean is the halfway point between the lower end and the upper end.

The margin of error is the distance of these two points(lower and upper end) to the mean.

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Upper end: 3.87

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3 years ago