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aniked [119]
3 years ago
13

Please help me!

Mathematics
1 answer:
Galina-37 [17]3 years ago
4 0

Step-by-step explanation:

transformation : f(x) --> g(x) = -2x + 4

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The situation is as follows: Smart phones have changed the world and how we spend our time. A group of researchers at BYU want t
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Answer:

The 96% confidence interval estimate for the mean daily number of minutes that BYU students spend on their phones in fall 2019 is between 306.65 minutes and 317.35 minutes.

Step-by-step explanation:

Confidence interval normal

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 - 0.96}{2} = 0.02

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.02 = 0.98, so Z = 2.054.

Now, find the margin of error M as such

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

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 2.054\frac{54}{\sqrt{430}} = 5.35

The lower end of the interval is the sample mean subtracted by M. So it is 312 - 5.35 = 306.65 minutes

The upper end of the interval is the sample mean added to M. So it is 312 + 5.35 = 317.35 minutes

The 96% confidence interval estimate for the mean daily number of minutes that BYU students spend on their phones in fall 2019 is between 306.65 minutes and 317.35 minutes.

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2 years ago
1) A museum charges different rates for adults and students. Adult
sveta [45]

Answer:

Step-by-step explanation:

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3 years ago
Which of the following simplifies to a negative number?
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This is the correct answer people I just took the lesson. -4^-4
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3 years ago
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Small circular disks are being cut from thin sheets of steel. The steel weighs 1.6 grams per square centimeter. The disks need t
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Answer:

A = 19.63cm^2

Step-by-step explanation:

Given

d =5cm

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This is calculated as:

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A = \frac{3.14 * 25}{4}

A = \frac{78.5}{4}

A = 19.625

A = 19.63cm^2 --- approximated

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Brett shaded 4/8 of a sheet of notebook paper. Aisha says he shaded 1/2 of the paper . Are the two fractions equivalent ? If so
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Yes, the fractions are equivalent. Other fractions are 5/10, 6/12, 7/14,8/16, 9/18, 10/20.
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