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A phase III double-blind randomized trial is planned to compare a new drug versus placebo as adjuvant therapy for the treatment of women with metastatic ovarian cancer who have had complete clinical response to their primary treatment protocol, consisting of surgical debulking and platium-based chemotherapy. Find the total sample size needed using a two-sided test at the 0.05 level of significance and a statistical power of 80% to detect the alternative hypothesis that the two-year relapse rates in the placebo and the new drug arms are 60% and 40%, respectively.
a normal distribution has a mean of 500 and a standard deviation of 50. a manager wants to simulate one value from this
an insurance policy is written to cover a loss x where x has a uniform distribution on 0 1000. at what level must a
a random variable x takes values between 0 and 4 with a cumulative distribution functionfx x216 for 0 x 4a sketch
Evaluate the result in part c with the decision using the expected value approach.
The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean for a sample of n = 100 is 2 points. Explain the difference in the standard error??
A randomized controlled trial was designed to compare the effectiveness of splinting against surgery in the treatment of carpal tunnel syndrome.
Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers, 36% indicated that they watch the late evening news on this local CBS station. What is t..
Perception of Time- Randomly selected statistics students of the author participated in and experiment to test their ability to determine when 1 min(or 60 seconds) has passed.
Ten bolts were selected randomly from a production line and the diameter of each was measured. Why do these diameters not have a binomial distribution?
Using the quadratic equation x2 - 4x - 5 = 0, perform the following assignment Solve by factoring and solve by using the quadratic formula
a company decides to add a new program that prepares randomly selected sales personnel to increase their number of
you like to go fishing off a bridge on a quiet back road. your father showed you this special spot and he always use to
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