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A set of 50 data values has a mean of 31 and a variance of 25.
I. Find the standard score (z) for a data value = 35.
II. Find the probability of a data value > 35.
Solution
I'm assuming it's a normal distribution? If so, then you need to use the standard
normal table for the second part. to find the z-score, the formula is (X-mew)/(SD/sqrt(n))
mew=31, SD=625, n=50, X=35

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A set of 50 data values has a mean of 31 and a variance of 25. I. .pdf

  • 1. A set of 50 data values has a mean of 31 and a variance of 25. I. Find the standard score (z) for a data value = 35. II. Find the probability of a data value > 35. Solution I'm assuming it's a normal distribution? If so, then you need to use the standard normal table for the second part. to find the z-score, the formula is (X-mew)/(SD/sqrt(n)) mew=31, SD=625, n=50, X=35