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A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on risk of cardiovascular disease. Suppose that 40% of participants consume caffeine and smoke. If 8 participants are evaluated, what is the probability that:
A. Exact half of them consume caffeine and smoke?
B. At most 6 consume caffeine and smoke?
A recent study of cardiovascular risk factors reports that 30% of adults meet the criteria for hypertension. If 15 adults are assessed, what is the probability that:
A. Exactly 5 meet the criteria for hypertension?
B. None meet the criteria for hypertension?
C. Less than or equal to 7 meet the criteria for hypertension?
Please explain in detail how the answers were created.
What is your initial perception of this information? What are other ways, beyond looking at the p-value alone, you could use to try to interpret what this outcome of r(2398) = -.21 tells us about the relationship between length of time taking drug..
Compute the mean, median, and mode. Which of these measures of central tendency do you think most accurately describes the lifestyle variable you are looking at?
Rob Johnson is a product manager at Diamond Chemicals, which is considering whether to launch a new product line that will require it to build a new facility.
The standard deviation of the sample is $3,000. Interpret your findings.
Among 500 freshmen pursuing a business degree at a university, 347 are enrolled in an economics course, 204 are enrolled in a mathematics course, and 160 are enrolled in both an economics and a mathematics course.
This is called a one-time fling. About 10% of all adults deliberately do a opne-time fling and feel no guilt about it!
Stanford Binet IQ scores have a mean of 100 and a standard deviation of 15. Albert Einstein reportedly had an IQ of 160. Convert Einstein's IQ score to a z score.
An investment broker reports that the yearly returns on common stocks are approximately normally distributed with a mean return of 12.4 percent and a standard deviation of 20.6 percent.
Bougainvilleas, mean growth rate was 2.23 inches/week and sample standard deviation was 0.77 inches/week. Determine a 90% confidence interval for mean growth rate of all Bougainvilleas.
Determine regression line for predicting January temperature from latitude.
If you are using the method of least squares for fitting trends in an annual time series containing 25 consecutive yearly values,
Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:
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