Question: Refer to Exercise 5. a. Find a 95% lower confidence bound for the mean strength. b. Someone says that the mean strength is less than

Refer to Exercise 5.
a. Find a 95% lower confidence bound for the mean strength.

b. Someone says that the mean strength is less than 50.4 kN. With what level of confidence can this statement be made?

Refer to Exercise 5.

In a sample of 100 steel wires the average breaking strength is 50 kN, with a standard deviation of 2 kN.

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