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Distribution of Sample Mean

The breaking strength of a certain brand of steel cable is normally distributed, with a mean of µ = 2500 pounds, and a standard deviation of Ï? = 250 pounds.

If a construction company buys 25 cables, what is the probability that they will have a mean breaking strength of at least 2400 pounds?

Express your answer as a decimal and round your final answer

Solution Summary

Step by step method for computing the sampling distribution of sample mean.