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Police response time to an emergency call is the difference between the times the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. over a long period of time it has been determined that the police responce time has a normal distribution with a mean of 8.4 minutes and a standard deviation of 1.7 minutes. for a randomly recieved emegency call, what is the probability that the response time will be:
a) between 5 and 10 min
b) less than 5 min
c) more than 10 min
the population mean is 75. a random sample of 48 items is selected from the population. what is the probability that
the data below are the temperatures on randomly chosen days during a summer class and the number of absences on those
The standard IQ test has a mean of 100 and a standard deviation of 13. We want to be 98% certain that we are within 2 IQ points of the true mean. Determine the required sample size.
A 25% loss with probability 0.1 ignoring all other losses what premium should the insurance company charge each season to realize an average profit of $500.
a random sample of 49 lunch customers was taken at a restaurant. the average amount of time the customers in the sample
prepare a 2 slide microsoft powerpoint presentation with speaker notes how to use a z-test to test the null hypothesis
given the probability that james will go the gym after work is 28 and the probability that sam will go the gym after
At Ajax Spring Water, a half-liter bottle of soft drink is supposed to contain a mean of 520 ml. The filling process follows a normal distribution with a known process standard deviation of 4 ml.
suppose the u.s. president wants an estimate of the proportion of the population who support his current policy toward
a local health care company wants to estimate the mean weekly elder day care cost. a sample of 10 facilities shows a
The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table.
potholes occur on a major citys streets at a rate of 4.2 per mile. what is the probability that a quarter-mile stretch
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