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An experiment was performed to determine if a new educational program given by pharmacists could reduce the prescribing of a widely used analgesic that had been proven to be inferior to aspirin. The physicians were randomly assigned to either control (n = 142) or the new educational program (n = 140), and their prescriptions of the analgesic were monitored from medical records.
After the education program, 58 of the physicians in the control group prescribed the analgesic and 42 in the education group. Test for no difference in the proportion prescribing the analgesic at the α = .05 level.
determine the named distribution that would best used to find situations and explanation why. a person draws 5 cards
q1. with random sampling there is homogeneity within a subgroup or stratum.a. judgmental b. simple c. clusterd.
In a sample of 59 business trips taken by employees in the HR department, a company finds that the average amount spent for the trips was $1,495 with a standard deviation of $458.
Call centers typically have high turnover. The director of human resources for a large bank has compiled data on about 70 former employees at one of the bank's call centers in the Excel file Call Center Data.
1. Discuss the context in which can be analyzed by using a random-effects model. 2. What are the reasons for conducting a two-way analysis rather than two sep- arate one-way ANOVAs? Explain.
find the standard deviations of the random variable. options a 6 b 7 c 10 d
A government official estimates that the mean time required to fill out the long form of the United States Census follows a distribution which is approximately normal with mean 36 minutes. A random sample of 16 people who were given the long form ..
calls to a customer service center last on average 2.4 minutes with a standard deviation of 1.5 minutes. an operator in
There is a famous saying in statistics that "Correlation does not imply causation". Please address the following questions:
What is the probability that the sum of the two dice is 7 given that the first one is an even number? Show all work. Just the answer, without supporting work, will receive no credit. Are event A and event B independent? Explain.
State your hypothesis, draw your curves, label your critical values and your test statistic, state your decision to accept or reject and write your conclusion in the language of the problem. Use a=0.05.
Based on the information, what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
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