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A prospective cohort study is run to estimate the incidence of stroke in persons 55 years of age and older. all participants are free of stroke at study start. Each participant is followed for a maximum of 5 years. The data are summarized below
A) what is the annual incidence rate of stroke in men? Incidence rate= _________ per 1,000 person-years/
B) What is the annual incidence rate of stroke in women? Incidence rate=__________ per 1,000 person-years.
C) What is the annual incidence rate of stroke for men and women combined? Incidence rate=______ per 1,000 person-years
Use the t-distribution table to find the critical values for the indicated alternative hypothesis, level of significance, a and sample size n1 and n2. Assume that the sample are independent, normal and random. Ha: u1
Construct a scatter plot for the data. Does the relationship appear to be linear and state appropriate null and alternate hypotheses with regard to correlation.
find the mean variance and standard diviation of the binomial distribution with the given values of n and pn- 121 p
Compute the correlation and sample covariance. Compute the sample covariance and the sample correlation. Intuitively, what kind of correlation.
Find the value of W, the test statistic for a two sample rank-sum test that would compare the two methods for losing weight. Give the details of how you found W. Please show your step-by-step hand calculation here.
Let Z be the random variable giving the number of times the second biased coin (coin #2) comes up heads. What is the probability mass function of Z? What is the mean and variance of Z?
Using the 0.05 level of significance, is there evidence that the population mean is above $300? What is your answer in (a) if s = $90 and the 0.10 level of significance is used?
if x is a binomial random variable where n100 and p.1 find the probability that x is less than or equal to 12 using the
Draw the decision tree and perform a decision tree analysis of Steeley Associates decision situation using expected monetary value and what is the value of the information provided by Bernard Consultants (EVSI)? Give a recommendation as to whether ..
We often hear you can lie with statistics. This is one way of saying statistics can be easily mis-communicated. Find one example of how statistics are mis-communicated and explain why there was a mis-communication and what you would do to correct ..
Interpret the slope.
The ANOVA summary table below is the result of a regression of sales on year of sales. Is the relationship statistically significant at .05? Comment.
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