# Differences

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 math-340:m340-f15-hw:hw-20 [2015/11/03 18:00]dcs math-340:m340-f15-hw:hw-20 [2015/11/15 03:32] (current)dcs Both sides previous revision Previous revision 2015/11/15 03:32 dcs 2015/11/03 18:00 dcs 2015/11/03 17:45 dcs 2015/10/25 15:39 dcs 2015/10/25 15:29 dcs created 2015/11/15 03:32 dcs 2015/11/03 18:00 dcs 2015/11/03 17:45 dcs 2015/10/25 15:39 dcs 2015/10/25 15:29 dcs created Line 11: Line 11: Also: Also: - - Suppose the lifetime of a certain tire has a normal distribution with mean 50,0000 miles and standard deviation 5000 miles. Find: + - Suppose the lifetime of a certain tire has a normal distribution with mean 50,000 miles and standard deviation 5000 miles. Find: - The probability that a tire will last between 48,000 and 56,000 miles. - The probability that a tire will last between 48,000 and 56,000 miles. - Find the value $a$ such that the probability that a tire lasts more than $a$ miles is approximately 0.8. - Find the value $a$ such that the probability that a tire lasts more than $a$ miles is approximately 0.8.