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A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.1 years, and standard deviation of 0.9 years. The 4% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place.
Develop a probability distribution for the number of travelers who plan their trips within two weeks of departure.
The number of nonconforming springs in a batch,denoted as X, is a binomial random variable.
heights of men on a baseball team have a bell-shaped distribution with a mean of 169 cm and a standard deviation of 5
Category of decision rule which contains maximax decision rule is?
If the test is positive, what is the probability that this person actually has heart disease?
Nationwide, GMAT scores in a particular year had an average of 528 with an SD of 112 and the scores roughly followed a normal curve. If a student scored 600 on the exam, approximately what percentage of test-takers scored below this student?
a lathe is considered to be in perfect adjustment if the average length of the steel bars it cuts is 6 centimeters. a
the cost of a college education has increased at a much faster rate than costs in general over the past twenty years.
let x be the amount of time in minutes that a particular san francisco commuter must wait for a bart train. suppose
during the period of time that a local university takes phone-in registrations calls come in at the rate of one every
The national average SAT score (for Verbal and Math) is 1028. If we assume a normal distribution with σ = 92, what is the 90th percentile score? What is the probability that a randomly selected score exceeds 1200?
Weights are distributed normal with a mean of 132 pounds and a standard deviation of 27.4 pounds. In a random sample of 150, how many of them would be expected to weigh between 100 and 115 pounds?
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