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The following data give the amount of money (in dollars) spent on textbooks by 18 students for the last academic year at a large university.
510 425 190 298 157 260 320 615 455490 188 115 230 610 220 155 315 110
Test the hypothesis that the median amount spent on books at this university is $325 against the alternative that it is different using the large-sample sign test. Use α = 0.05.
randomly selected statistics students of the author participated in an experiment to test their ability to determine
a mobile phone has an advertised life of 30000 hours. a sample of 50 phones had a life of 28500 hours with a standard
What is the probability that a given team scored fewer than 2 runs in any given half-inning of the 1986 season?
A random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm. Assuming that the population standard deviation is known to be 1.6 cm, use a 0.05 significance level to test the claim that the mean circumference of all p..
the annual incomes of the five vice presidents of ellys industries are 41000 38000 32000 33000 and 50000. the annual
In a large university, 15% of the students are female. If a random sample of twenty students is selected,
1. Suppose you are testing H0: N(55, 64) vs. H1 N(45, 49), with α = .05. Your test will be one draw x from one of these two populations. What is your critical boundary for x (not the one for the z score of x)? For what values of x would you r..
Two new york designs are under consideration for possible adoption in an assembly plant. A time study is conducted with 10 workers using design 1, and 12 workers using design 2. The means and standard deviation of their assembly times in minutes a..
what is the sampling distribution model of the percent passing developmental courses for your campus in Fall 2009 and provide the percentages between which we would expect to see 68% of the sampling distribution, 95% of the sampling distribution
Calculating Statistical Values from Australian Department of Transport
in order to determine the average weight of carry-on luggage by passengers in airplanes a sample of 16 pieces of
What is the probability you will win any money in the state lottery and the probability that you will win at least $100
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