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3 years ago

1.Mr. Bowen’s test is normally distributed with a mean of 75 and a standard deviation of 3 points.

Mathematics

1 answer:

lianna [129]3 years ago

7 0

Answer:

2.28%

Step-by-step explanation:

Mr. bowens test is normally distributed with a mean (μ) of 75 and a standard deviation (σ) of 3 points.

The z score is used in probability to show how many standard deviation is a raw score below or above the mean. The formula for the z score (z) is given by:

$z=\frac{x-\mu}{\sigma}$

For a raw score (x) of 81 points, the z score can be calculated by:

$z=\frac{x-\mu}{\sigma}=\frac{81-75}{3}=2$

Therefore from the normal probability distribution table, the probability that a randomly selected score is greater than 81 can be given as:

P(x > 81) = P(z > 2) = 1 - P(z < 2) = 1 - 0.9772 = 0.0228 = 2.28%

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10 months ago

Read 2 more answers

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mr Goodwill [35]

Answer:

Step-by-step explanation:

First we have to assume the smallest integer.

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3 years ago

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The lowest term is $\frac{75}{4}$ .

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<u>To reduce this term to the lowest term:</u>

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Now, divide the numerator and denominator by the greatest common factor.

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