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The median age of residents of the united states is 31 years. If a survey of 109 randomly selected united states residents is to be taken, what is the approximate probability that at least 60 will be under 31 years of age?
What are some real life examples of the use of Chi-Square tests using contingency tables? Why is a test, which is testing significant differences among means called Analysis of Variance?
I understand how to do a time series graph with one variable versus time in years, but I am not sure how to graph if the time is in months with more than one variable with a scatter plot.
Suppose the joint probability density function of X and Y is uniform in the plane square with corners (0,0), (0,3), (3,0) and (3,3). Find the probability of X > 1 or Y > 1. Find the probability of X + Y
Be sure to show whether you use the t- or z- value, and what value you use. Interpret the confidence interval in a single sentence. In another sentence, state why you used either the "t" or the "z".
The lives of many people are affected by a fear that prevents them from flying. The Marist Institute for Public Opinion conducted a poll of 1014 adults
If the pairing is done at random, what is the probability that there are no white-black roommate pairs?
What is the probability that the sample will have between 50% and 60% of the identifications correct? What is the probability that the sample percentage of correct identifications is greater than 65%?
At one Las Vegas casino, if you net $5 that a 12 will come up as the total points on two dice, and you win, you will get back $50. If any total other than 12 comes up, you get back $0.
Determine the 95% confidence interval for the population mean, based on the sample mean.
Would you play this game if you wanted to make money? What do we expert the value of the results of the game to be?
Let X bar be the average of n such independent measurements. Use Chebychev's inequality to estimate how large n should be such that P(|X bar - M |
Determine the probability that the project will be completed in 90 days or less.
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