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A message arrive at a switch board in poisson distribution manner at an average rate of six per hour. Find the probability for exactly two messages arrive within one hour, no message arrive within one.
Balls that have been thoroughly mixed. Sue and Jim, each, purchased one gumball. What is the likelihood both Sue and Jim get red gumballs?
Ages of 56 attendees of a Harry Potter movie are shown. (a) Form seven age classes (10 to 20, 20 to 30, etc.). Tabulate the frequency of attendees in each class.
calculate the value of the test statistic set up the rejection region determine the p-value interpret the result and
The table below shows the probability distribution of the annual sales (in Millions) of a small rm. Calculate the Expected value, Variance, and Standard deviation of the annual sales?
at mikes auto service the mean time to diagnose a problem is 30 minutes with a standard deviation of 8 minutes. the
Construct a scatterplot for the (x, y) values below, and answer the following questions. What would be the slope of this regression line?
Assume 1.5% of antennas on new Nokia cell phones are imperfect. For random sample of 200 antennas, determine the probability that: None of the antennas is defective.
Downs and Abwender (2002) evaluated soccer players and swimmers to determine whether the routine blows to the head experienced by soccer players produced long-term neurological deficits.
Earthquakes occur in a given region in accordance with a Poisson process with rate 5 per year. What is the probability there will be at least two earthquakes in the first half of 2015?
the mean and standard deviation of the lifetime of a battery in a portable computer are 3.5 and 1.0 hours
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
1. The rate at which the production process goes from up to down (that is, the rate of breakdowns); 2. The average length of time the process remains down when it goes down; and 3. The average length of time the process remains up when it goes up.
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