3 years ago

Please help me with this question!

Mathematics

1 answer:

mezya [45]3 years ago

3 0

Answer:

$height = \frac{12 - 8}{2} = 2 \\ area = \frac{(12 + 8) \times 2}{2} = 20$

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Answer:

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Step-by-step explanation:

We are given the following information in the question.

Sample size, n = 20

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Sample standard deviation = 2

90% Confidence interval

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 19 and}~\alpha_{0.10} = \pm 1.729$

Margin of error:

$t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$1.729(\frac{2}{\sqrt{20}} ) = 0.773$

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Step-by-step explanation:

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