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A great deal of fighting took place in Africa during WWI. Both Britain and France drew on colonial troops to fight on many different front of the war. how important was Africa in the great war.
In each situation, explain whether it would be more appropriate to treat the observed data as a sample from a larger population or as data from the whole population.
You randomly select 40 cans and carefully measure the contents. The sample mean of the cans is 127.9 ounces. Does the machine need to be reset? Explain your reasoning.
A simple random sample of 400 trees is selected, and the sample mean age of these trees is computed. We know the random variable has an approximately normal distribution because of?
assume we know that the probability that a college student owns an iphone is 0.70. four students are selected at random
In a study shop, a set of data was collected to determine whether or not the proportion of defectives produced. Determine if the proportion of defectives is the same for all three shifts.
Consider the joint pdf fX;Y (x; y) = 6y; for 0
Estimate is too low for households in British Columbia. Can the value 0.64 be rejected if a survey of 490 homes in BC yields 331 with one or more lawn mowers?
fuel economy estimates for automobiles built one year predicted a mean of 25.8 mpg and a standard deviation of 7.2 mpg
a) Find the marginal density of Y. b) Find E(X) HINT: What is E (X|Y=y) ?
What is the difference between covalent bonds and ionic bonds as used in chemistry?
Mike hears the weather forecast, and there ia a 50 percents chance of rain.Find the probability that he will have to work overtime given taht it rains.
Suppose the waiting time at a traffic light has a uniform distribution from 0 to 20 seconds. Determine the probability of waiting exactly 12 seconds, less than 5 seconds, more than 10 seconds.
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