Z-score for sample mean
A normal population has m = 50 and s = 8. A random sample of n = 4 scores from this population has a mean of 54. What is the z-score for this sample mean?
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A building that was purchased on December 31, 2000, for $2,500,000 was originally estimated to have a life of 50 years with no salvage value at the end of that time.
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It is claimed that in a bushel of peaches less than ten percent are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the sample proportion?
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