Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
In the Physicians Health Study over 22,000 male physicians were randomly assigned to two groups. One group took an ordinary aspirin tablet every other day while the other group took a placebo. The study was double-blinded. After a number of years, the number of heart attacks was recorded for each of the subjects. For the aspirin group the number of attacks per 1,000 doctors was 9.42. The corresponding rate for the placebo group was 17.13.
(a) Is this an experiment or an observational study? Explain your choice.
(b) What are the explanatory and the response variables in this example? Indicate whether each is qualitative or quantitative.
(c) A critic of the study acknowledged that the aspirin group had a substantially lower heart attack rate than the placebo group, but suggested that the difference may be explained by the fact that the aspirin group may have been significantly healthier to begin with than the placebo group. Is the critic correct? Please explain.
the following problem should be answered in rgenerate 50 normal distributions with mean 15 and standard deviation 3
one out of 5000 individuals in a population carried a defective gene. a random sample of 1000 individuals is studied.
Assumptions of independence and significance. Wainwright, Leatherdale, and Dublin (2007) evaluated the advantages and disadvantages of using an ANOVA.
What was the correlation between health and education and how much variability in health could be accounted for by activity?
1. Calculate the area under the curve (to the 4th decimal) for the following examples:
Identify the independent and dependent variables and describe how they are being operationally defined in your research project. Identify the type of data being used. Describe your sample using descriptive statistics
Think about what these symbols can mean to you, and how your perceived meaning can differ from others' perceptions. Share your answers here.
Compute the reliability index and the failure probability assuming that the mean ratio of C/F is 1.0, 1.2, 1.4, 1.6, 1.8, 2.0, 2.2, 2.4, 2.6, 2.8, and 3.0.
Using the .02 level of significance, conduct a five-step hypothesis testing procedure to determine if the new processes significantly reduced the wait time.
Suppose the world series is about to begin. Some people get together and each decide to predict different win-loss patterns for the seven possible games during the coming series.
Assuming a normal?distribution, what is the probability that a can will be sold that holds more than 304 ?grams?
Find the sampling plan if the producer's stipulation is to be satisfied exactly. Find the average sample number for lots that are 1.8% nonconforming.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd