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If a polling organization must be especially careful to represent all regions of the United States, which type of sampling plan is most useful: multi-stage sampling, cluster sampling, convenience sampling, or systematic sampling?
A program was developed to improve nutrition among low-income residents in New York City. This program was evaluated by comparing NYC residents who were randomly assigned to the intervention group vs. residents assigned to the control group. The..
What is the standard deviation of the sampling distribution of p(hat) the proportion of all rolls of the die that show a 1 or a 2? 3.)
The Inland Revenue has introduced a self-assessment system for tax payments whereby citizens themselves calculate the amount of tax to be paid on income.
A diagnostic kit (for measuring a particular protein level in blood) can be used to test 16 blood samples. To check for kit-to-kit consistency the manu facturer tested the blood from 16 patients with two different kits. The data are recorded in..
Construct a frequency distribution of the scores.- Construct a histogram of the frequency distribution constructed in part a.
there is a certain disease in america which is very rare. the probability of a person having the disease is 1 in
The average hourly workweek varies from country to country for industrial workers.- What kind of graph is appropriate for these data? Create a graph and execute it.
Assume that the population standard deviation is 9 seconds. What is the lower bound of the 98% confidence interval.
A discrete random variable can have the values x = 3, x = 8, or x = 10, and the respective probabilities are 0.2, 0.7, and 0.1. Determine the mean, variance, and standard deviation of x.
They realize a conflict may result in mutual destruction. As long as the countries believe there is a balance of power we may hope for peace.
As the correlation coefficient increases from 0.85 to 0.88, do the points of the scatter plot move toward the regression line, or away from it?
Here are 3 questions from my homework this week. I need help answering them as well as the work associated with the processes of obtaining the answers. Thank you!
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