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mixer [17]
3 years ago
5

anonymous 2 years ago In 2011 current population survey conducted by the us census bureau, two average household income were rep

orted: $49,445 and $67,530. One of these averages is the mean and the other is the median. Which is the mean?
Mathematics
1 answer:
inna [77]3 years ago
7 0
The mean is 67530. But idk what background this question comes with
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Suppose that a sample of size 100 is to be drawn from a population with standard deviation L0. a. What is the probability that t
NARA [144]

Answer:

The probability that the sample mean will lie within 2 values of μ is 0.9544.

Step-by-step explanation:

Here

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The probability that the sample mean lies with 2 of the value of μ is given as

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Here converting the values in z form gives

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Substituting values

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From z table

P(z\leq 2)=0.9772\\P(z\leq -2)=0.0228\\P(-2\leq z\leq 2)=P(z\leq 2)-P(z\leq -2)\\P(-2\leq z\leq 2)=0.9772-0.0228\\P(-2\leq z\leq 2)=0.9544\\

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3 years ago
2. Calculate the angular speed of the 26-inch bicycle rotating at 200 revolutions per minute. Express your answer in radians per
Alexus [3.1K]
The angular velocity for this problem is given by:
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 The first thing you should keep in mind is the following conversion:
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 Applying the conversion we have:
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 Rewriting:
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 Answer:
 
the angular speed is:
 
Angular speed = 1256 radians / minutes
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Answer:

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6(3)-2

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