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McDonalds Waiting Times. You want to estimate SD for the population of waiting times at McDonald's drive up windows. You want to be 95% confident that the sample SD is within 20% of SD. Find the minimum sample size. Is this sample size practical?
Suppose that in a certain population of married couples 30% of the husbands smoke, 20% of the wives smoke, and in 8% of the couples both the husband and wife smoke. Is the smoking status (smoker or nonsmoker) of the husband independent of that of the..
Describe a where you might want to use a dummy variable in a multiple regression. What would the dummy variable buy you in that situation?
Define research question and response Take a sample of adolescents without acne Double-blind randomized controlled trial.
in a trial of 250 patients who received 10-mg doses of a drug daily 30 reported headaches as a side effect.a obtain a
Which of the 4 methods of data collection is involved when a person counts the number of cars passing designated location on the Los Angeles freeway system?
the human relations department of electronics inc. would like to include a dental plan as part of thebenefits package.
a student encounters an animal embryo at the eight-cell stage. the four smaller cells that comprise one hemisphere of
What is the role of the F test in multiple regression? (b) How is the F statistic calculated from the ANOVA table? (c) Why are tables rarely needed for the F test?
The effectiveness of short term relaxation and cognitive-behavioral
Confidence interval for the population mean - Prepare a 99% confidence interval for the population mean.
q1. suppose the monthly percentage changes in the tse 300 index from 1980 to 2000 are normally distributed with a
find and attach a cross tabulation of data that is of interest to you. write a question for the following along with
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