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A doctor wants to estimate the mean HDL cholesterol of all? 20- to? 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99 % confidence assuming s=19.9 based on earlier? studies? Suppose the doctor would be content with 95 % confidence.
How does the decrease in confidence affect the sample size? required?
A? 99% confidence level requires?
A 90% confidence level requires?
Suppose that each adult subject in an experiment is given either treatment I or treatment II. Prove that the proportion of men among the subjects who receive
On a correlation matrix, you will usually see two values per comparison. The top value for a correlation measurement will be the Pearson correlation
A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of $5.29 with a standard deviation of $3.02.
They want to make sure that their sample size is large enough so they can detect a difference of .10 in the proportion smoking with α = .05 and β = .10. What size sample should they take in each high school?
Test an appropriate hypothesis and state your conclusion. Explain how you dealt with the outlier and why you made the recommendation you did.
Model Fitness. With any statistical model, we assess the fit: Does the model accurately depict the truth? Explain how one of the following helps assess the "fitness" of the mean.
Conclude that is there a difference in the two amounts?
determine the values of c so that the following function represent joint probability distributions of the random
A bag of 32 tulip bulbs contains 11 red tulip? bulbs, 11 yellow tulip? bulbs, and 10 purple tulip bulbs.
In this problem you will write code to simulate the Markov chain from the up-down stock problem we have been discussing in lecture
Discuss in groups and comment on the statement that if managers learned how to conduct research by taking a course such as this there would no need to seek outside consultant help to solve their problems.
Every time Player A loses he must pay Player B $1, while every time Player B loses he must pay Player A $3. - If the two players repeat the game 10 times, what is the expected value of Player A's winnings?
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