PLEASE HELP!!!

Mathematics

1 answer:

monitta3 years ago

5 0

<h3>Answer:</h3>

(m, a, b, c) ∈ {(1, 196, 441, 210), (7, 28, 63, 30)}

<h3>Step-by-step explanation:</h3>

m is a common factor of 196, 210, 441

The prime factors of those numbers are

... 196 = 2²×7²

... 210 = 2×3×5×7

... 441 = 3²×7²

7 is the only prime factor common to all the numbers. Hence the possible values of m are 1 and 7.

For m = 1, (a, b, c) = (196, 441, 210).

For m = 7, (a, b, c) = (196, 441, 210)/7 = (28, 63, 30).

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Rachael got a 550 on the analytical portion of the Graduate Record Exam (GRE). If GRE scores are normally distributed and have m

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Answer:

Z=-2

This value means that the score of Rachel 550 it's 2 deviations below the mean of the population $\mu=600$

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

$\mu=600$ represent the population mean for the Graduate Record Exam (GRE)

$\sigma=25$ represent the population standard deviation for Graduate Record Exam (GRE)

2) Solution to the problem

Let X the random variable that represent the Graduate Record Exam (GRE) of a population, and for this case we know the distribution for X is given by:

$X \sim N(600,25)$