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The number X of fatal traf?c accidents in a certain city during a year may be assumed to be an r.v. distributed as P(l). For the latest year x = 4, whereas for the past several years the average was 10. Test whether it has been an improvement, at level of signi?cance a = 0.01. First, write out the expres- sion for the exact determination of the cut-off point, and secondly, use the CLT for its numerical determination.
a box contains 10 blue and 5 red markers. find the probability of obtaining at least two red markers if four markers
a jury of 6 persons was selected from a group of 20 potential jurors of whom 8 were african american and 12 were white.
is there a linear correlation between the age of the student and the stress level? student
What is the probability that One member of the committee lives in northern Kentucky and the others live in Ohio and At least 1 member of the committee lives in northern Kentucky?
if a person bought 1 share of google stock within the last year what is the probability that the stock on that day
Q1. A prison psychologist recorded the number of rule infractions for 15 prison inmates over a six-month period to be 5, 4, 2, 4, 3, 5, 2, 0, 4, 4, 5, 5, 3, 4, and 3. a. Make a frequency table. b. Make a histogram based on the frequency table.
an independent-measures research study uses two samples each with n 12 participants. if the data produce a t statistic
The number of items rejected daily by the manufacturer because of defects for last 30 days are:
The Big Triple at the local racetrack consists of picking the correct order of finish of the first three horses in the ninth race. If there are 12 horses entered in today's ninth race, how many Big Triple outcomes are possible?
The herbal formula is effective in preventing colds? Is the probability that the observed difference occurred by chance small, less than or equal to 1 in 20 (0.05)?
A California lawyer practices law, on the average, for 30 years. Assuming these members remain steady, how many lawyers would you expect California to have in 2050.
Pedestrian Walk Buttons New York City has 750 pedestrian walk buttons that work, and another 2500 that do not work (based on data from "For Exercise in New York Futility, Push Button
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