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3 years ago

A set of physics exam scores are normally distributed with a mean of 80 points and a standard deviation of 6

Mathematics

1 answer:

Anuta_ua [19.1K]3 years ago

3 0

Answer:

The proportion of exam scores that are lower than Irina's score is 0.9938

Step-by-step explanation:

mean: 80 points

standard deviation (sd): 6 points
value of interest (x): 95 points

z-score is computed as follows:

z = (x - mean)/sd

z = (95 - 80)/6 = 2.5

We want to find:

P(z < 2.5)

From the table attached:

P(z < 2.5) = 0.9938

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3 years ago

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Nataly_w [17]

Answer:

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Step-by-step explanation:

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3 years ago

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sp2606 [1]

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3 years ago

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3 years ago

3(2x + 2) - 3x = 6 + 3x

mrs_skeptik [129]

Answer:

no solution

Step-by-step explanation:

3(2x + 2) - 3x = 6 + 3x

6x + 6 - 3x = 6 + 3x

6x - 3x = 3x

3x + 6 = 6 + 3x

the answer would be

no solution

5 0

2 years ago

Read 2 more answers