Scores for a common standardized college aptitude test are normally distributed with a mean of 480 and a standard deviation of 114. Randomly selected men are given a Test Preparation Course before taking this test. Assume, for sake of argument, that the preparation course has no effect. If 1 of the men is randomly selected, find the probability that his score is at least 521.2. P(X> 521.2) = Enter your answer as a number accurate to 4 decimal places. If 15 of the men are randomly selected, find the probability that their mean score is at least 521.2. P(M> 521.2) = = Enter your answer as a number accurate to 4 decimal places. Assume that any probability less than 5% is sufficient evidence to conclude that the preparation course does help men do better. If the random sample of 15 men does result in a mean score of 521.2, is there strong evidence to support the claim that the course is actually effective? No. The probability indicates that it is too possible by chance alone to randomly select a group of students with a mean as high as 521.2. O Yes. The probability indicates that it is (highly ?) unlikely that by chance, a randomly selected group of students would get a mean as high as 521.2.

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Scores for a common standardized college aptitude test are normally distributed with a mean of 480 and a standard deviation of 114. Randomly selected men are given a Test Preparation Course before taking this test. Assume, for sake of argument, that the preparation course has no effect. If 1 of the men is randomly selected, find the probability that his score is at least 521.2. P(X > 521.2) = Enter your answer as a number accurate to 4 decimal places. If 15 of the men are randomly selected, find the probability that their mean score is at least 521.2. P(M > 521.2) = Enter your answer as a number accurate to 4 decimal places. Assume that any probability less than 5% is sufficient evidence to conclude that the preparation course does help men do better. If the random sample of 15 men does result in a mean score of 521.2, is there strong evidence to support the claim that the course is actually effective? No. The probability indicates that it is too possible by chance alone to randomly select a group of students with a mean as high as 521.2. Yes. The probability indicates that it is (highly ?) unlikely that by chance, a randomly selected group of students would get a mean as high as 521.2.
Scores for a common standardized college aptitude test are
normally distributed with a mean of 480 and a standard
deviation of 114. Randomly selected men are given a Test
Preparation Course before taking this test. Assume, for sake
of argument, that the preparation course has no effect.
If 1 of the men is randomly selected, find the probability
that his score is at least 521.2.
P(X> 521.2) =
Enter your answer as a number accurate to 4 decimal
places.
If 15 of the men are randomly selected, find the probability
that their mean score is at least 521.2.
P(M> 521.2) =
Enter your answer as a number accurate to 4 decimal
places.
Assume that any probability less than 5% is sufficient
evidence to conclude that the preparation course does help
men do better. If the random sample of 15 men does result
in a mean score of 521.2, is there strong evidence to
support the claim that the course is actually effective?
O No. The probability indicates that it is too possible
by chance alone to randomly select a group of
students with a mean as high as 521.2.
O Yes. The probability indicates that it is (highly?)
unlikely that by chance, a randomly selected group of
students would get a mean as high as 521.2.
Transcribed Image Text:Scores for a common standardized college aptitude test are normally distributed with a mean of 480 and a standard deviation of 114. Randomly selected men are given a Test Preparation Course before taking this test. Assume, for sake of argument, that the preparation course has no effect. If 1 of the men is randomly selected, find the probability that his score is at least 521.2. P(X> 521.2) = Enter your answer as a number accurate to 4 decimal places. If 15 of the men are randomly selected, find the probability that their mean score is at least 521.2. P(M> 521.2) = Enter your answer as a number accurate to 4 decimal places. Assume that any probability less than 5% is sufficient evidence to conclude that the preparation course does help men do better. If the random sample of 15 men does result in a mean score of 521.2, is there strong evidence to support the claim that the course is actually effective? O No. The probability indicates that it is too possible by chance alone to randomly select a group of students with a mean as high as 521.2. O Yes. The probability indicates that it is (highly?) unlikely that by chance, a randomly selected group of students would get a mean as high as 521.2.
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