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A) It is known that the annual snowfall totals in Maine are normally distributed with a mean of 80.3 inches and a standard deviation of 23.7 inches. What is the probability that Maine gets more than 120 inches (10feet) of snow in a randomly select year?
B) It is known that the lifetime of a lightbulb is normally distributed with a mean lifetime of 1,060 hrs and a standard deviation of 125 hrs. What is the probability that a randomly selected light bulb will last between 1,000 and 1,100 hrs?
Find a 95% confidence interval for the mean dielectric strength of the oil.
Compute the sample variance and the sample standard deviation for these data (to 2 decimals).
the variability in the value of a statistic from sample to sample is known as?characteristics of a sample are known
suppose a penny arcade worker is in charge of keeping ten machines in operation. the failure rate of each machine
the table summarizes results from 978 pedestrian deaths that were caused by automobile
a researcher wants to compare how college graduates and college drop-outs feel about the legalization of marijuana. she
imagine you are a manager at a major bottling company. customers have begun to complain that the bottles of the brand
in 2010 a gallup poll surveyed 1016 households in the u.s about their pets. of those surveyed 599 said they had at
Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a second group do not. After 6 months, both groups are tested on their knowledge
write a matlab program that can simulate picking skittles from a bag 1 at a time without replacement. and shows the
Mike has est that the store sells about 800 SONY sets annually. Estimated holding cost is $30 per set and ordering cost is $20 per order. Describe the inventory pattern graphically.
for a particular instant lottery the bettor can determine immediately whether a purchased ticket is a winning ticket.
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