The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 cm and a standard deviation of 0.3 cm.What is the probability that average length of a steel sheet from a sample of 9 units is more than 29.95 cm long?

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The Answer of The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 cm and a standard deviation of 0.3 cm.What is the probability that average length of a steel sheet from a sample of 9 units is more than 29.95 cm long?

The Population of Lengths of Aluminum-Coated Steel Sheets Is Normally