Dullco
Manufacturing claims that its alkaline batteries last forty hours on
average in a certain type of portable CD player. Tests on a random
sample of 18 batteries showed a mean battery life of 37.8 hours with a
standard deviation of 5.4 hours.
In a left-tailed test at = .05 we would __________.
A. comfortably accept the claim B. switch to alpha of 0.01 for a more powerful test C. comfortably reject the claim D. feel uncomfortable with either decision (too close)
In a left-tailed test at = .05 we would __________.
A. comfortably accept the claim B. switch to alpha of 0.01 for a more powerful test C. comfortably reject the claim D. feel uncomfortable with either decision (too close)
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