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Simulate survival times X from an exponential distribution with rate lambda=1 with a censoring distribution C being exponential with rate theta = 2/3 in R.
Plot Kaplan-Meier Survival curve estimates along with true survival curve for n=25,100,1000
Interpret the meaning of the slopes of the given multiple regression equation
Using the Binomial Distribution, find the probability that if Air Northeast books 22 people on a flight, not enough seats will be available for all booked passengers.
If a researcher decides to use multiple comparisons in a study with three conditions, what is the probability of a Type I error across these comparisons? Use the Bonferroni adjustment to determine the suggested alpha level.
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
We are interested in testing to see if the variance of a population is less than 7. The correct null hypothesis is:
The data in the next table resulted from an experiment that used a completely random design. Test the null hypothesis that u1 = u2 = u3, where ui represents the true mean for treament i, against the alternative that at least two of the means differ..
Suppose we want to conduct a poll to estimate the proportion of voters who approve of the current mayor, and we plan to use a 95% confidence interval for our estimate.
What proportion of time will it take clean-up crew 56 or more hours for cleaning plant? Define the lower and upper limits of interval.
A researcher is interested in whether social assertiveness might be influenced by training procedures. Two groups of college sophomores are randomly selected. Group A subjects are assigned to the "training sessions" and Group B subjects do not rec..
Study is conducted as to whether there is relationship between joggers and consumption of nutritional supplements.
Which of the following would have a binomial distribution and evaluate the binomial coefficient
A random sample of 20 single men was asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that
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