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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.
According to census records, the age distribution of the inhabitants of the United States in 1960 and in 1980 is as shown in the table below.
A club has twenty members aged twenty. What are the chances that at least one fourth of them will die before their 65th birthdays?
Develop a 90 percent confidence interval for the proportion opposing health care changes. (Round your answers to 4 decimal places.)
In Dallas some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 143, 348 runs and had 20 accidents, while the fleet of yellow firetrucks made 135,035 runs and had 4..
Assume that sigma = 60, choose an alpha level, and perform a hypothesis test to determine whether this is good evidence to conclude that the mean score for all young men is less than 275.
The mean monthly income of the trainees of an engineering firm is $600, with a standard deviation of $100. Find the probability that an individual trainee earns less than $500 per month.
In particular, he is interested in knowing the expected proportion of loans in the portfolio that would have balances below $170,000. You are asked to conduct an appropriate analysis and write a short report to the senior loan officers with your c..
What is the probability an advertising firm selected at random has either an income between $1 million and $20 million, or an income of $20 million or more?
suppose that the probability of a baseball player getting a hit in at bat is 0.2807. if the player has 38 at-bats
1. The Inn at Columbia has 150 rooms with standard queen-size beds and two two rates: a full price of $200 and a discount price of $120. To receive the discount price, a customer must purchase the room at least two weeks in advance (this helps to ..
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.
Determine if there is a linear correlation between annual income and the amount of insurance? What is the linear regression line for this data?
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