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A tool-crib with one attendant serves a group of 10 mechanics. Mechanics work for an exponentially distributed amount of time with mean 20 minutes, then go to the crib to request a special tool. Service times by the attendant are exponentially distributed, with mean 3 minutes. If the attendant is paid $6 per hour and the mechanic is paid $10 per hour, would it be advisable to have a second attendant?
The incarceration rate in one nation's prisons was 965 per 100,000 male residents, and 65 per 100,000 female residents.
The ACT is also distributed with meanof 21 and standard deviation of 4.7. Rachel wants to be in the 98th percentile on each test. What scores must she recieve on each exam?
Calculate distance in inches that a bicyclist travelling 35 mph moves in 1/125 of a second? Notice the bicyclist is riding along a white line. Suppose the length of this white line captured in a photograph is 14 ft.
The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. At the 0.05 level, is there a difference among the means?
State along statistical certainty there is a difference among the population proportions of those favoring Statement.
Define the population. State the hypotheses for the study. Decide which statistical test is appropriate and compute the test statistic (z or t). Why is the test appropriate?
State the null and alternative hypotheses needed to attempt to establish that the advertisement increases the mean attitude score
in a normal distribution with u mu90 and o sigma15 find the proportion of data values between 80 and
Also suppose that the probability that the current player does not reach the semifanals of the tournament is 0.58 and that there is a 0.71 probability that jill is ranked next weekon the WTA circuit. What is the probability that the current player..
question the average price of a gallon of unleaded regular gasoline was reported to be 3.13 in illinois. use this
According to the retail electronics chain, adults in 40 to 50 year old age group, the mean amount spent per year on electronics is $1998.
You wish to determine whether consumers have made substantial progress in reducing their credit card debt? Based on a sample of 1000 consumers in September 2001,
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