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Given the following data set: 10, 15, 7, 1, 4, 6, 6, 0. Calculate the z-score for the smallest and largest observations. Is either of these observations unusually large or unusually small?
Out of 1000 people surveyed, 600 belonged to urban areas and rest to rural areas. Among 500 who visited other states , 400 belonged to urban areas. Test 5 % level of signifi
You calculate that their mean monthly rent is $613 and their standard deviation is $96. What are the degrees of freedom for a one-sample -statistic?
The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a
Is this enough evidence to support Union's position? Use significance level of a = 0.05. You may suppose the mean annual salaries are normally distributed.
A husband and wife make their decisions independently of each other, and then they compare their decisions. If they agree, the decision is made; if they do not agree, then fur
The p-value approach was to be used. A sample of size 49 gave a sample mean of 508. Given that σ = 30.2, and α = 0.01, find the p-value, and write your conclusion.
State the general relationship between consumption Y and disposable income X in (a) exact linear form and (b) stochastic form. (c) Why would you expect most observed values
A silver dollar is flipped 100times, with the following results: Heads =57, tails=43. What test should be used to determine if this is a fair coin?
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