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1. Clinical trials play a vital role in testing and development of new drugs and medical devices.
a. What are clinical trials?
b. Explain the difference between controlled and uncontrolled trials.
c. Why are controls important?
d. What are single and double blinding? How is blinding used in a clinical tri- al?
e. What types of outcomes for patients are measured through the use of clini- cal trials? Name at least four.
a company sells lamps of which 15 are defective.a what is the probability that in a box of 14 lamps there will be at
one concern about the depletion of the ozone layer is that the increase in uv light will decrease crop yields. an
What formula would I use? Can you break it down into baby steps so I can understand how you got the answer?
If the sample size (n) is large, and the sample is a random sample, then the distribution of the sample mean x-bar is approximately a:
You have picked out the carton of 1 dozen eggs (that's 12 eggs) at grocery store. Find out the probability that at most two of eggs in carton are cracked.
Suppose that 245 such companies are selected independently and at random. What is the probability that 191 companies in the sample electronically monitor their employees?
A sample of 8 jars has a mean of 15.6 ounces and a standard deviation of 0.3 ounce. Is there enough evidence to support the consumer's conjecture at a = 0.05? First, identify the alternative and the null hypotheses.
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Do the data indicate a significant difference? Test with ∝ = .05.
below are data showing the results of six subjects on a memory test. the three scores per subject are their scores on
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Suppose a study is constructed to test a claim, at a 0.05 signifigance level that a population proportion is 40%. A simple random sample of 750 subjects has a proportion of 42%.
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