According to Business Week, profits in the energy sector have been rising, with one company averaging $3.42
Question:
According to Business Week, profits in the energy sector have been rising, with one company averaging $3.42 monthly per share. Assume this is an average from a population with standard deviation of $1.5. If a random sample of 30 months is selected, what is the probability that its average will exceed $4.00?
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Related Book For 
Complete Business Statistics
ISBN: 9780077239695
7th Edition
Authors: Amir Aczel, Jayavel Sounderpandian
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