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icang [17]
3 years ago
11

A certain region of America with over 500,000 households has a mean household income of $70,000 with a standard deviation of $20

,000. Economists plan to take random samples of 625 households and calculate the sample mean income for each sample. Calculate the mean of the sampling distribution of x-bar.
Mathematics
1 answer:
Llana [10]3 years ago
3 0

Answer:

Mean = 70,000 dollars

SD = 800 dollars

For Khan Academy

Step-by-step explanation:

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The number of pens used varies directly with the number of pieces of paper needed. If 12 pens are used when 40 pieces of paper a
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Answer:


Step-by-step explanation:

Y=KX


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Again here we're using like terms

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The functions will be defined as y = x² if 0 ≤ x < 3, y = -x + 10 if 3 < x ≤ 6, and y = x + 2 if 6 ≤ x ≤ 10.

<h3>What is a function?</h3>

A statement, principle, or policy that creates the link between two variables is known as a function. Functions are found all across mathematics and are required for the creation of complex relationships.

The graph is given below.

The function can be defined as

The parabolic equation will be

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The equation of the absolute function will be

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Then we have

f(x) = \left\{\begin{matrix}y=x^2 & 0\leq x < 3 \\\\y=-x+10 & 3 < x\leq 6 \\\\y=x+2 & 6\leq x \leq 10 \\\end{matrix}\right.

More about the function link is given below.

brainly.com/question/5245372

#SPJ1

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