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Mekhanik [1.2K]
2 years ago
10

What percent of 250 is 100?

Mathematics
1 answer:
mr_godi [17]2 years ago
7 0

Answer:

40%

Step-by-step explanation:

100 is 4p% of 250

hope it helped!

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The fuel efficiency in miles per gallon of all bmw 320i's is (approximately) normally distributed with a mean of 25 and a standa
grigory [225]
Given:
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σ = 2 mpg, the population standard deviation

If we select n samples for evaluation, we should calculate z-scores that are based on the standard error of the mean.
That is,
z= \frac{x-\mu}{\sigma / \sqrt{n} }

The random variable is x = 24 mpg.

Part (i):  n = 1
σ/√n = 2
z = (24 -25)/2 = -0.5
From standard tables,
P(x < 24) = 0.3085

Part (ii): n = 4
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Part (iii): n=16
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P(x < 24) = 0.0228

Explanation:
The larger the sample size, the smaller the standard deviation.
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