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If you had only one minute to estimate the standard deviation of a frequency distribution using only the information that can be obtained from a stem and leaf display, how would you do it and why?
Select a US citizen and a citizen of China at random, independently of one another. Determine the probability that both have type O blood?
He randomly samples 45 oil wells throughout the United States and determines the mean output to be 10.7 barrels per day with a standard deviation of 1.3 barrels. Test the researcher's claim at the .025 level of significance.
A population of scores has p = 44. In this population, an X value of 40 corresponds to z = - 0.50. What is the population standard deviation.
Compute a 95% confidence interval for the population proportion of positive drug tests. Explain why is the normality assumption not a problem despite the very small value of p.
The response of the GSS question in 2006 about the number of hours daily spent watching TV, the responses by the seven subjects who identified themselves as Hindus were 2,3,2,1,0,1,4,3. find a point estimate of the population mean for Hindus. The ..
Determine whether the description corresponds to an observational study or an experiment. Thirty university students are divided into two groups, one group receives free tutoring in mathematics, the other does not.
The so-called "Gambler's Fallacy" makes the mistake of not recognizing:
Determine the probability in big class that both sections are covered? Only one section? Neither section? Determine the expected number of sections covered?
To see if his belief is substantiated, conduct the test at a suitable significant level. State the assumptions made. see if his belief is substantiated, conduct the test at a suitable significant level. State the assumptions made.
Determine the largest plausible average balance for the accounts of those using her managed fund in which you could have 90% confidence.
Alice and Bob agree to meet at the bus stop between 12 noon and 1pm. They each arrive at a random time in that interval and wait for 5 minutes before leaving, unless they see the other person. What is the probability that they meet each other?
From a practical point of view, what is the difference between the frequency distribution and relative frequency distribution? Why is a cumulative relative frequency distribution so much more informative that just the relative frequency distributi..
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