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Simple random sampling uses a sample of size n from a population of size N to obtain data that can be used to make inferences about the characteristics of a population. Suppose that, from a population of 75 bank accounts, we want to take a random sample of six accounts in order to learn about the population. How many different random samples of six accounts are possible?
Use the traditional method to test the given hypothesis. Assume that the population is the normally distributed and that the sample has been randomly selected.
Using a one-sided hypothesis test with a 90% confidence level, which of the following statements do these data support?
Find the proportion of employees who are managers and have MBA degrees.
According to an exit poll taken by CNN during the 2008 Democratic Primary in Connecticut, 552 registered voters voted for Hilary Clinton and 598 for Barack Obama. Would you have been willing to predict Obama as the winner?
We assume that the population is approximately normally distributed. Find the confidence interval: for a confidence level of 95%:
Which measure of association do you use to compare the relationship between these variables? Why?
Calculate a value of lambda using the data from last week concerning the news networks and the reporting practices. Compare your resulting lambda to the resulting chi-square from last week.
Suppose 40% of a student population possess works part-time. If a random sample of size 300 is drawn from the population, what is the probability that 44% or fewer of the samples works part-time?
Would this be a T-value distribution? Can you take me through the steps to determine upper and lower limits of a 95% confidence interval?
What is the probability that at most five cases of E. coli per 100,000 are reported in California this year?
The least squares simple linear regression line minimizes the sum of the vertical deviations between the line and the data points.
With this information, by constructing a 2 by 2 table, compute the predicative value positive and predictive value negative of the ELA in hypothetical population of 1000000 blood donors.
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