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Ket [755]
2 years ago
9

Suppose the test scores on an exam show a normal distribution with a mean of 82 and a standard deviation of

Mathematics
1 answer:
Zanzabum2 years ago
5 0

Answer:

a) Between 74 and 90

b) 81.86% of the scores are between 78 and 90

Step-by-step explanation:

a) According to the Empirical Rule, in a normal distribution, 95% of the data are within 2 standard deviations of the mean. Therefore, the range that 95% of the scores fall in is between 82-4(2)=74 and 82+4(2)=90.

b) The percent of scores that are between 78 and 90 is: normalcdf(lower,upper,μ,σ) = normalcdf(78,90,82,4) = 0.8185946784 ≈ 0.8186, or about 81.86% of the scores.

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Plz Answer In your own words Explain what the vertical line test is and how it is used.
zavuch27 [327]

Answer:

See below (I hope this helps!)

Step-by-step explanation:

The vertical line test is a test used to determine whether a relation is also a function. It is done by inserting several vertical lines that intersect the relation. If a vertical line intersects the relation at multiple point, then it is not a function. If every single inserted vertical line intersects the relation at only one point, then the relation is a function.

7 0
2 years ago
You are enlarging a photograph to make a poster. The posterwill be similar to the original photograph. The photograph is6 inches
natka813 [3]

Answer:

Poster’s perimeter = 150 in

Step-by-step explanation:

Given:

Width of poster = 2.5 ft = 2.5 × 12 = 30 in

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Height of poster = [30×6]/4

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3 years ago
What is the height of a cylinder with volume 6,908 cubic feet and with a radius of 10 feet? (Round to the nearest integer)
Eduardwww [97]
21.99 but rounds to 22
4 0
3 years ago
Solve the equation.-21=m/3m<br> m=7<br> m=-7<br> m=-63<br> m=63
Jlenok [28]
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6 0
3 years ago
Sarah will buy bracelets and necklaces in order to sell them in her schools fund raising activity. The bracelets cost $2 and the
Alborosie

Answer:

The answer will be:

b ≥ 10

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The bracelets cost $2 and the earrings cost $3.

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6 0
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