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Directions: Your answer may be an integer, a decimal, or a fraction, and it may be negative. Enter the exact answer unless the question asks you to round your answer.
Q. A list of numbers has a mean of 8 and a standard deviation of 2.5. If x is a number in the list that is 2 standard deviations above the mean, what is the value of x = ?
Correct answer is '13'. Can you explain this answer?
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Directions: Your answer may be an integer, a decimal, or a fraction, ...
You are given that x is 2 standard deviations above the mean, 8. Because the standard deviation of the numbers in the list is 2.5, it follows that x is (2)(2.5), or 5 units above the mean 8. Therefore, x = 8 + 5 = 13, and the correct answer is 13.
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Directions: Your answer may be an integer, a decimal, or a fraction, and it may be negative. Enter the exact answer unless the question asks you to round your answer.Q. A list of numbers has a mean of 8 and a standard deviation of 2.5. If x is a number in the list that is 2 standard deviations above the mean, what is the value of x = ?Correct answer is '13'. Can you explain this answer?
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