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Problem 1:
Suppose we ignore the order in which the patients received the treatments. Count the number of patients who had higher sleep duration on the investigational drug than on placebo.
a. Suggest another simple test for assessing the effectiveness of the investigational drug.
b. Give a p-value for the test of part (a).
Problem 2:
An investigational drug product was studied under sleep laboratory conditions to determine its effect on duration of sleep. A group of 16 patients willing to participate in the study were randomly assigned to one of two drug sequences; 8 were to receive the investigational drug in period 1 and an identical-appearing placebo in period 2, and the remaining 8 patients were to receive the treatment in the reverse order.
a. Identify the design.
b. Give a model for this design.
c. State the assumptions that might affect the appropriateness of this design.
The Bombay Company offers reproductions of classic 18th- and 19th-century English furniture pieces, which have become popular in recent years. The following table gives the probability distribution of the number of Raffles tables sold per day at ..
Assuming that the data may be looked upon as a random sample from a normal population, construct a 99% con?dence interval for the actual average Hb level in children with chronic diarrhea for this city and interpret. Draw a box plot and normal plo..
What decision does the expected value approach recommend and what is your indifference probability for the $0.00 payoff?
The strength of the linear relationship between two numerical variables may be measured by the
If the system has failed, it costs us an additional $1000. Compute the expected total cost incurred at time 3.
a researcher wishes to estimate the average amount of money a person spends on lottery ticket each month. a sample of
Carry out suitable multiple comparison procedure to determine the source of the difference.
6 % have both defects. If you purchase one of the flashights in this shipment, find the probability that it has the following: defective bulb or a defective battery.
you have just been hired by an auto manufacturer. management wants to know if cars are younger today versus 1995.
Fast ‘n Clean operates 12 laundromats on the east side of the city. All of Fast ‘n Clean's clothes dryers have a label stating "20 minutes for $1.00." Conduct the same two-tail hypothesis test, but this time use the confidence interval app..
Temperature in a certain city for the month of June follows a uniform distribution over the interval 61º F to 91º F. What is the probability that a randomly selected June day has a temperature that exceeds 70º F?
Set up a null and alternative hypothesis to test whether this sample is falling below expectations.
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