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!
Question: Baldness and Heart Attacks On March 8, 1993, Newsweek announced, "A really bad hair day: Researchers link baldness and heart attacks" (p. 62). The article reported that "men with typical male pattern baldness . . . are anywhere from 30 to 300 percent more likely to suffer a heart attack than men with little or no hair loss at all." Pattern baldness is the type affecting the crown or vertex and is not the same as a receding hairline; it affects approximately one-third of middle-aged men. The report was based on an observational study conducted by researchers at Boston University School of Medicine, in which they compared 665 men who had been admitted to hospitals with their first heart attack to 772 men in the same age group (21- to 54-years-old) who had been admitted to the same hospitals for other reasons. Thirty-five hospitals were involved, all in eastern Massachusetts and Rhode Island.
The study found that the percentage of men who showed some degree of pattern baldness was substantially higher for those who had had a heart attack (42%) than for those who had not (34%). Further, when they used sophisticated statistical tests to ask the question in the reverse direction, they found an increased risk of heart attack for men with any degree of pattern baldness. The analysis methods included adjustments for age and other heart attack risk factors. The increase in risk was more severe with increasing severity of baldness, after adjusting for age and other risk factors. The authors of the study speculated that there may be a third variable, perhaps a male hormone, that both increases the risk of heart attacks and leads to a propensity for baldness. With an observational study such as this, scientists can establish a connection, and they can then look for causal mechanisms in future work.
Explain how much money do these people make each year. Suppose you read in your local newspaper that 45 officials in student services whioch is earned as an average.
DAY 1. Multiply the three matrices together in order (A*B*C) to get a fourth matrix 'D'. What is the fourth matrix? DAY 2. Multiply the fourth matrix by the scalar 6 to get a fifth matrix E.
A psychologist records the duration of natural labor (in hours) in a sample of 36 first-pregnancy mothers. Based on the duration data given in the following.
Suppose a large sample is selected (instead of just 10). About 95 percent of the predictions regarding sales would occur between what two values? Determine the regression equation.
question golds gym selected a random sample of 10 customers and monitored the number of times each customer used the
Generate 500 different random samples of n = 5 observations. Draw a sketch showing the shape of the histogram of sample means for random samples of n = 5.
A local car dealer is attempting to determine which premium will draw the most visitors to its showroom. An individual who visits the showroom and takes a test ride is given a premium with no obligation. The dealer chose four premiums and offered ..
the following information is collected from students upon exiting the campus bookstore during the first week of
Assume that the population standard deviation is 9 seconds. What is the lower bound of the 98% confidence interval.
a bank has the following data on the gender and marital status of 200 customers: single 20 male 30 female, married male 100 female 50,
urn 1 has five white and seven black balls. urn 2 has three white and twelve black balls. we flip a fair coin. if the
For each tourist entering the United States, the U.S. Immigration and Naturalization Service computer is fed the tourist's nationality and length of intended stay. Characterize each variable as quantitative or qualitative.
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