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4 years ago

A proofreader reads 200 pages in 8 hours. How many pages does the proofreader read in 30 minuets

Mathematics

1 answer:

umka21 [38]4 years ago

6 0

If 200/8=25 per hour, then i divided that by 2 to get 12.5 for 30 minutes.

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3 years ago

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Answer:

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3 years ago

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A rectangular room is 3 times as long as it is wide, and its perimeter is 48 meters. Find the dimension of the room.

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4 years ago

Please help me with this question

scZoUnD [109]

12 hours? If I'm wrong, sorry about that

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3 years ago

Your boss tells you that she knows the length of the widgets your company makes is normally distributed with a mean of 25 inches

sp2606 [1]

Answer:

Mean of sampling distribution = 25 inches

Standard deviation of sampling distribution = 4 inches

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 25 inches

Standard Deviation, σ = 12 inches

Sample size, n = 9

We are given that the distribution of length of the widgets is a bell shaped distribution that is a normal distribution.

a) Mean of the sampling distribution

The best approximator for the mean of the sampling distribution is the population mean itself.

Thus, we can write:

$\bar{x} = \mu = 25\text{ inches}$

b) Standard deviation of the sampling distribution

$s = \dfrac{\sigma}{\sqrt{n}} = \dfrac{12}{\sqrt{9}} = 4\text{ inches}$

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3 years ago