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In high schools A and B, the proportion of teenagers smoking has been estimated to be .20. The same antismoking educational program will be used again in high school A but a new program is planned for high school B. There is concern whether the new program will be better or worse than the old one or if the results will be about the same.
A study is planned to compare the proportion smoking in the two high schools in June after the programs have been run. The investigators want to take an adequate sample of students and ask them questions concerning their smoking.
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?
Find the alternative would be chosen according to expected value and utility.
A standard deviation of 4.0 days; and 12 employees were absent more than 10 days. Set up a 95% confidence interval estimate of the average number of days absent for the company's workers last year.
According to Chebyshev's Theorem, how many students scored between 23 and 95?
a recreational equipment supplier finds that among orders that include tents 40 also include sleeping mats. only 5 of
Bus105 computing assignment - Find at least one journal article or website related to the survey of Gym customers and give a brief description.
What are the first three ammendments and how did they affect the united states culture?
a student organization wants to start a nightclub for students under the age of 21. to assess support for this proposal
what is the percentage of the total area under the normal curve within plus and minus 2.1 standard deviations of the
If IQ scores on a Stanford-Binet Test are basically distributed with the mean of 100 and a standard deviation of 15, then about how many people in a randomly chosen million would be expected to score at 160 or above?
Compare the mean for the heights of males and the mean of the heights of females in the following data. Compare the values and explain what can be concluded based on the numbers.
What are the requirements for applying the hypothesis test for the difference in two population proportions? What are the calculations (computations)?
It was found that the correlation is about .80 and the regression equation is handspan = 3 + 0.35 height What is the predicted handspan for someone 5 feet tall?
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