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If the analysis of variance F-test leads to the conclusion that at least one of the model parameters is nonzero, can you conclude that the model is the best predictor for the dependent variable y? Can you conclude that all of the terms in the model are important for predicting y? What is the appropriate conclusion?
based on a study of heights of men and women who played basketball a researcher concludes that the exercise from
a bank has the following data on the gender and marital status of 200 customers: single 20 male 30 female, married male 100 female 50,
q1. for this assignment you will be provided with 2 clinical research questions on sample size and one published paper
Transportation officials tell us that 80% of drivers wear seat belts while driving. What is the probability that between 538 and 546 drivers in a sample of 700 drivers wear seat belts?
Make a point estimate of the population mean difference in endurance after taking the herbs. Make a 95% confidence interval estimate of the population mean difference.
A poll of 1,068 adult Americans reveals that 52% of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 significance level, test the claim that more than half of all voters prefer the Democrat.
The publisher of popular financial periodical has decided to undertake a campaign in an effort to attract new subscribers.
What happens to the confidence interval if you (a) increase the confidence level, (b) increase the sample size, or (c) increase the margin of error?
Perform a linear regression, 8 month moving average & 3 month moving average forecasting technique to see which is most accurate for the new quarter 11 if quarter 11 sales are 172,000 units
In the science exhibit of a museum of natural history, a coin-flipping machine tosses a silver dollar into the air and tallies the outcome on a counting device. What are all of the respective possible outcomes in any three consecutive coin tosses?
a. Find the mean value of x (the mean number of systems sold). b. Find the variance and standard deviation of x. How would you interpret these values? c. What is the probability that the number of systems sold is within 1 standard deviation of its me..
Assume that one of the subjects is randomly selected. Find the probability that the selected subject is not pregnant, given that the test was negative. I the result the same as the probability of a negative test result given that the selected subj..
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