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Major motor failures occur among the buses of a large bus company at the rate of2 a day. Assuming that each motor failure requires the services of 1 mechanic for a whole day, how many mechanics should the bus company employ to insure that the probability is at least 0.95 that a mechanic will be available to repair each motor as it fails? (More precisely, find the smallest integer K such that the probability is greater than or equal to 0.95 that K or fewer motor failures will occur in a day.)
The following questions concern a dataset on tween mobile phone use (available on Blackboard "dataset_tweens mobile phone 2015"). 1144 children between 9 and 12 answered a survey on their mobile phone use. Construct a histogram of the variable 'Pri..
Is it reasonable to conclude that this set of n = 16 people is not a representative random sample of registered voters?
Suppose a random variable has some PDF given by fx(x). - Find a function g x such that Y g(X) = is a uniform random variable over the interval (0 ,1) .
Suppose 10 identical radar sets have a failure law following the exponential distribution. The sets operate independently of one another
the annual income of residents in a county is 42000 with a standard deviation of 10000. assuming that the distribution
The information that the distribution of the serve speeds was bell shaped. What proportion of the player's serves are expected to be between 107 mph and 118 mph?
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
(a) What is the shape of this sampling distribution? [How do you know?] (b) What is the mean of this sampling distribution? (Give your answer correct to one decimal place.)
a production process is set to manufacture bolts with a diameter of 0.5 inches. if production is meeting these
Given the consumer is 18 to 24 years old, what is the probability that the consumer uses a plastic card? Given the consumer is over 24 years old, what is the probability that the consumer uses a plastic card?
The purpose of this research was to determine if there were any statistically significant differences in the average perceptions within these three groups.
How should it maximize total earned interest? Given that Three-month CD's can only be bought in Jan and April; six-month CD's can only be bought in January.
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