Q.4-68 (b) What thickness is exceeded by 95% of the samples?(c) If the specifications require that the thickness is between4-68. The demand for water use in Phoenix in 2003 hit a high38 cm and 1.44 cm, what proportion of the samples meetsspecifications?ehout 2150 million liters per day on June 27, 2003 (http://phoenix.gov/WATER/wtrfacts.html). Water use in the summere normally distributed with a mean of 1170 million liters perday and a standard deviation of 170 million liters per day. Cityreservoirs have a combined storage capacity of nearly 1320million liters.(a) What is the probability that a day requires more water thanis stored in city reservoirs?(b) What reservoir capacity is needed so that the probabilitythat it is exceeded is 1%?otort to doss(c) What amount of water use is exceeded with 95% probability?(d) Water is provided to approximately 1.4 million people.What is the mean daily consumption per person at whichthe probability that the demand exceeds the current reser-voir capacity is 1%? Assume that the standard deviation ofaid 00S.014-69. The life of a semiconductor laser at a constant power ishormally distributed with a mean of 7000 hours and a standardA 88-Ademand remains the same.deviation of 600 hours.(a) What is the probability that a laser fails before 6000 hours?(b) What is the life in hours that 95% of the lasers exceed?(c) If three lasers are used in a product and they are assumed tofail independently, what is the probability that all three arenting after7000 hours?

Name: Q.4-68 (b) What thickness is exceeded by 95% of the samples?(c) If the
Uploaded: 2024-03-20T07:06:41.000Z
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Description: Q.4-68 (b) What thickness is exceeded by 95% of the samples?(c) If the specifications require that the thickness is between4-68. The demand for water use in Phoenix in 2003 hit a high38 cm and 1.44 cm, what proportion of the samples meetsspecificatio