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Suppose that a sample size 58 is drawn from a population with mean 30 and standard deviation 51, find the valve, the mean of the distribution of sample means.
Production of the three machines one article is selected at random. if it found that this article is defective, what is the probability that it was manufactured by machine X?
RESEARCHERS at a university conducted experiments with poplar trees. Listed below are weights (kg) of poplar trees given no treatment and poplar trees treated with fertilizer and irrigation.
In a random sample 1040 consumers, you find 35% have stopped buying the product. At alpha=0.04, do you have enough evidence to support the claim?
a researcher wants to know how consumption spending responds to changes in disposable income.nbsp the researcher
the following data reports the income rate 1000 and average expense 1000 for the large area in the u.sareaincome rate
a scientific committee of 4 persons is to be randomly selected from a group consisting of 3 biologists 3 physicists and
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location.
in a test of a method of gender selection a trial is designed so that five couples give birth to five children. how
a binomial experiment has 10 trials with a probability of success of 0.62 in each trial. what is the standard deviation
Consider a newly arriving customer to the checkout line. What is the probablility that this customer will not have to wait behind anyone?
a) Define your random variables, and use them to express the farmer's net income. b) Find the mean of the net income. c) Find the standard deviation of the net income. d) Do you need to make any assumptions in calculating the mean? How ab..
Given that you don‘t win first prize, what is the probability that you will win second prize? (The first-prize ticket is not put back into the hopper before the second-prize ticket is drawn.) What is the probability that your mother will come in..
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