A company installs 5000 light bulbs, each with an averge life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. find the percentahe of bulbs that can expected to last the period of time. less than 690 hours

A company installs 5000 light bulbs, each with an averge life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. find the percentahe of bulbs that can expected to last the period of time. less than 690 hours

A company installs 5000 light bulbs, each with an averge life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. find the percentahe of bulbs that can expected to last the period of time. less than 690 hours

Weegy: 4 is .5 less than the mean of 4.5 To get the z score for this, just do .5 / .3 The z score will be negative, since you're considering something less than the mean. [ [ Look up a z score chart and figure out the percentage of the data that will be less than that z score. ]
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