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miss Akunina [59]
3 years ago
7

Steve read 400 pages in 5 days. Write two equivalent reading rates?​

Mathematics
2 answers:
kirza4 [7]3 years ago
5 0

Answer:

800 pages in 10 days

80 pages in 1 day

240 pages in 3 days

arlik [135]3 years ago
4 0

Answer:

80 pages in 1 day

800 pages in 10 days

Step-by-step explanation:

Hope this helps!

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An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 280 engines
DENIUS [597]

Answer:

The value of the test statistic is t = -2.09

Step-by-step explanation:

The null hypothesis is:

H_{0} = 6.6

The alternate hypotesis is:

H_{1} \neq 6.6

Our test statistic is:

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation(square roof of the variance) and n is the size of the sample.

In this problem, we have that:

X = 6.5, \mu = 6.6, \sigma = \sqrt{0.64} = 0.8, n = 280

So

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t = \frac{6.5 - 6.6}{\frac{0.8}{\sqrt{280}}}

t = -2.09

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4 0
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