Lifetime of batteries in flashlight
Assume that the lifetime of batteries in flashlight is exponentially distributed with mean of 35 hours. Determine the probability that the batteries will last between 25 and 30 hours?
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The time it takes to completely clean office building follows exponential distribution with mean of 135 minutes. Determine the probability of cleaning an office building in 135 minutes or less?
Let x be a uniform random variable on the interval 1?x?6. What is the standard deviation of x?
Assume that the lifetime of batteries in the flashlight is exponentially distributed with the mean of 35 hours. Determine the probability that the batteries will last between 25 and 30 hours?
Assume a preliminary screening is given to prospective student athletes at a university to determine whether they would qualify for a scholarship. The scores are approximately normal with a mean of 85 and a standard deviation of 20. If the range o
The lodge at the ski resort has 50 suites. In the winter months, the occupancy rate for the suites is approximately 90%. What is the probability that 45 or fewer rooms are occupied on a given day?
A small business owner finds out that her revenue throughout the next year should be approximately normally distributed with mean of $425,000 and standard deviation of $130,000. Determine the probability that her revenue will exceed $600,000
A market researcher for consumer electronics company desires to study the television viewing habits of residents of particular area. A random sample of 40 respondents is chosen, and each respondentent is instructed to keep detailed record of all t
The personnel director of the large corporation desires to study absenteeism among clerical workers at corporation's central office during the year. A random sample of 25 clerical workers reveals the following:
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