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Ipatiy [6.2K]
2 years ago
9

Compare the scores: a score of 75 on a test with a mean of 65 and a standard deviation of 8 and a score of 75 on a test with a m

ean of 70 and a standard deviation of 4.
Mathematics
1 answer:
LiRa [457]2 years ago
7 0

Answer:

The Zscore for both test is the same

Step-by-step explanation:

Given that :

TEST 1:

score (x) = 75

Mean (m) = 65

Standard deviation (s) = 8

TEST 2:

score (x) = 75

Mean (m) = 70

Standard deviation (s) = 4

USING the relation to obtain the standardized score :

Zscore = (x - m) / s

TEST 1:

Zscore = (75 - 65) / 8

Zscore = 10/8

Zscore = 1.25

TEST 2:

Zscore = (75 - 70) / 4

Zscore = 5/4

Zscore = 1.25

The standardized score for both test is the same.

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2.75m+3.25=13.70


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Answer:

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2 years ago
Caroline, Colin & Sarah share some money.
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Caroline, Colin & Sarah share some money.Caroline will get \dfrac{2}{3}  when Caroline, Colin & Sarah share some money.

<h3>What is the ratio?</h3>

The ratio defined as the sharing of the two or three things or it represent that one thing or number is how many times to the other.

One part is excluded in the problem. That part is:

"Caroline gets \dfrac{1}{9} of the money."

If Caroline gets 1/9th, then remaining is:

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8/9th in 4 parts means, each part is:

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We know Colin gets "3" parts of the total, each part is (2/9)th, so 3 parts would be:

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Colin gets  \dfrac{2}{3} money when three of them share money.

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