The administrator of a small postal substation tries to quantify the variation in weekly demand for mail delivery tubes. She finds that the demand follows a distribution in which all its central trend measures are identical. He knows that on average 100 tubes are bought per week and that, the 90% of the time, the weekly demand is 115. a. What is the standard deviation of the distribution? b. The administrator wants to store enough shipping tubes each week, so that the probability of running out of shipping tubes is no greater than 0.05 What is the lowest storage level?
The administrator of a small postal substation tries to quantify the variation in weekly demand for mail delivery tubes. She finds that the
demand follows a distribution in which all its central trend measures are identical. He knows that on average 100 tubes are bought per week and that, the
90% of the time, the weekly demand is 115.
a. What is the standard deviation of the distribution?
b. The administrator wants to store enough shipping tubes each week, so that the probability of running out of shipping tubes is no greater than 0.05
What is the lowest storage level?
Select one:
a. RESPONSE TO: 9.1185 AND ANSWER B: 114.9999
b. REPLY A: 8.7845 AND REPLY B: 114.9999
c. RESPONSA: 1.645 AND RESPONSE B: 100
d. ANSWERAA: 9.1185 AND ANSWERB: 90.3841
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