Question: Refer to Exercise 7. a. Find a 95% lower confidence bound for the mean capacity of this type of battery. b. An engineer claims that

Refer to Exercise 7.
a. Find a 95% lower confidence bound for the mean capacity of this type of battery.

b. An engineer claims that the mean capacity is greater than 175 ampere-hours. With what level of confidence can this statement be made?

Refer to Exercise 7.
The capacities (in ampere-hours) were measured for a sample of 120 batteries. The average was 178 and the standard deviation was 14.

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