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Suppose you have a histogram that shows relative frequency. How do you calculate the proportion of the sample that lies between any two of the histogram bars?
What is the probability that of today's 1,000 callers at least 5 received a busy signal? Use the poisson approximation to the binomial. (Round your answer to 4 decimal places.)
The main goal of correlation research is ______________
A manager hopes to improve the sales figures for 10 employees by sending them to a motivational seminar. To test the effectiveness of this seminar
You want to know whether the population means are different in the two populations. Conduct an hypothesis test using an alpha of .05 and the critical value method.
Let the random variable X represent the number of defective DVD players among 200 randomly selected DVDs of this type. Does the random variable X have a binomial distribution or a Poisson distribution?
Compute mean, variance, and standard deviation of number of parents who correctly recognize their child's illness. Determine the probability at most five parents are correct.
Assume the probability that a person has the desease is 0.09 for all people, independently of each other, and compute the expected number of tests necessary for the entire group of 154 people.
One more box is tested, and if that passes, all bulbs made that day will pass. Find probability that first box fails and second box passes.
in a large american university in 1969 the male and female professors were sample independently yielding the following
When considering the symmetric approximation and Monte Carlo risk approaches. Both make the assumption that the total cost distribution is normal.
What does a line plot do to the shape of the graph of time values which are not uniformly spaced? Would an XY plot show the shape of the data more accurately?
If the class does well on an exam, then the next exam is equally likely to be any of the three types. If the class does badly, then the next exam is always type 1. What proportion of exams are type 1, 2, and 3?
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