A tablet computer manufacturer claims that its batteries last an average of 10.5 hours when playing videos.
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A tablet computer manufacturer claims that its batteries last an average of 10.5 hours when playing videos. The quality-control department randomly selects 20 tablets from each day’s production and tests the fully charged batteries by playing a video repeatedly until the battery dies. The quality-control department will discard the batteries from that day’s production run if they find convincing evidence that the mean battery life is less than 10.5 hours. Here are a dotplot and summary statistics of the data from one day:
a. State appropriate hypotheses for the quality-control department to test. Be sure to define your parameter.
b. Check if the conditions for performing the test in part (a) are met.
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