In an examination the probability distribution of scores (X) can be approximated by normal distribution with...

In an examination the probability distribution of scores (X) can be approximated by normal distribution with mean 64.9 and standard deviation 9.4.

Suppose one has to obtain at least 55 to pass the exam. What is the probability that a randomly selected student passed the exam? [Answer to 3 decimal places]

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If two students are selected randomly what is the chance that both the students failed? [Answer to 3 decimal places]

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If only top 4% students are given an award, then what was the minimum marks required to get the award? [Answer to 1 decimal place]

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orchestra answered 1 year ago

College entrance examination scores (X) have an approximately normal distribution with mean 500 and standard deviation...

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21- Scores on an examination are assumed to have a normal distribution with mean 78 and...

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Scores on a certain nationwide college entrance examination follow a normal distribution with a mean of...

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Scores on a certain nationwide college entrance examination follow a normal distribution with a mean of...

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In an examination the probability distribution of scores (X) can be approximated by normal distribution with...

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College entrance examination scores (X) have an approximately normal distribution with mean 500 and standard deviation...

21- Scores on an examination are assumed to have a normal distribution with mean 78 and...

Scores on a certain nationwide college entrance examination follow a normal distribution with a mean of...

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