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IgorLugansk [536]
3 years ago
10

Mathematics achievement test scores for 300 students had a mean and a variance equal to 550 and 3,600, respectively. If the dist

ribution of test scores was mound-shaped, approximately how many of the scores would fall in the interval 490 to 610? (Round your answer to the nearest whole number.)

Mathematics
1 answer:
blondinia [14]3 years ago
6 0

Answer:

number of scores between 490 and 610 is = 0.68 x 300 = 204

Step-by-step explanation:

The concept of Probability distribution is applied as it relates to the Z-scores.

Z = X - Mean /Standard deviation

The detailed steps and appropriate substitution is as shown in the attached file.

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For this case we have that by definition, the slope of a line is given by:

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(x_ {1}, y_ {1})\\(x_ {2}, y_ {2})

They are two points through which the line passes.

According to the statement we have two points:

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Substituting we have:

m = \frac {7-3} {4-1} = \frac {4} {3}

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\frac {4} {3}

Answer:

\frac {4} {3}

4 0
3 years ago
Find the missing term.
Oksi-84 [34.3K]

Answer:

-2 - 24i

Step-by-step explanation:

a + bi + (7 - 3i) + (5 + 9i) + 13i = 10 - 5i

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4 0
3 years ago
Saul is choosing a frame for his artwork. There are 5 wooden frames, 3 metal frames, and 8 plastic frames available.
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Hello!
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The answer to your question is 16 ways.
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6 0
3 years ago
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vagabundo [1.1K]
I hope this helps you

7 0
4 years ago
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Answer:

Step-by-step explanation:

-d + 6 = 16

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7 0
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