1. Suppose the project director for the Hilltop Coffee study (see Section 9.3) asked for a .10 probability of claiming that Hilltop was not in violation when it really was underfilling by 1 ounce ( µa...

1. Suppose the project director for the Hilltop Coffee study (see Section 9.3) asked for a .10
probability of claiming that Hilltop was not in violation when it really was underfilling by
1 ounce ( µa  2.9375 pounds). What sample size would have been recommended?
2.. Aspecial industrial battery must have a life of at least 400 hours. Ahypothesis test is to be
conducted with a .02 level of significance. If the batteries from a particular production run
have an actual mean use life of 385 hours, the production manager wants a sampling procedure
that only 10% of the time would show erroneously that the batch is acceptable.
What sample size is recommended for the hypothesis test? Use 30 hours as an estimate of
the population standard deviation.