Question
In: Statistics and Probability
High levels of cholesterol in the blood are associated with higher risk of heart attacks. Will...
High levels of cholesterol in the blood are associated with higher risk of heart attacks. Will using a drug to lower blood cholesterol reduce heart attacks? The Helsinki Heart Study recruited middle-aged men with high cholesterol but no history of other serious medical problems to investigate this question. The volunteer subjects were assigned at random to one of two treatments: 2051 men took the drug gemfibrozil to reduce their cholesterol levels, and a control group of 2030 men took a placebo. During the next five years, 56 men in the gemfibrozil group and 84 men in the placebo group had heart attacks. Is the apparent benefit of gemfibrozil statistically significant? Perform an appropriate test to find out.
Solutions
orchestra answered 2 years agoRelated Solutions
High levels of cholesterol in the blood are associated with higher risk of heart attacks. Will...
High levels of cholesterol in the blood are associated with
higher risk of heart attacks. Will using a drug to lower blood
cholesterol reduce heart attacks? The Helsinki Heart Study
recruited middle-aged men with high cholesterol but no history of
other serious medical problems to investigate this question. The
volunteer subjects were assigned at random to one of two
treatments: 2051 men took the drug gemfibrozil to reduce their
cholesterol levels, and a control group of 2030 men took a...
Too much cholesterol in the blood increases the risk of heart disease. The cholesterol levels for...
Too much cholesterol in the blood increases the risk of heart
disease. The cholesterol levels for women aged 20 to 34 follow the
Normal distribution with mean ?? =185 milligram per deciliter
(mg/dl) and standard deviation ?? =39 mg/dl. a) Cholesterol level
above 240 mg/dl demand medical attention. If a young woman is
randomly selected, what is the probability that her cholesterol
level is above 240 mg/dl? b) Find the lowest cholesterol level for
the women in the top 30%...
I need answer for b) High blood cholesterol levels increase the risk of heart disease. Young...
I need answer for b)
High blood cholesterol levels increase the risk of heart
disease. Young women are generally less afflicted with high
cholesterol than other groups. The cholesterol levels for women
aged 20 to 34 years follow an approximately normal distribution
with mean 185 milligrams per deciliter (mg/dl) and standard
deviation 39 mg/dl.
a) Cholesterol levels above 240 mg/dl demand medical attention.
What percent of young women have levels above 240 mg/dl?
b) Among a random sample of 150...
1.) HDL-cholesterol has a direct relationship with heart disease risk: higher HDL is associated with a...
1.) HDL-cholesterol has a direct relationship with heart disease
risk: higher HDL is associated with a greater risk of developing
heart disease.
True or False
2.) Balance refers to the ability to maintain one's center of
gravity within the base of support.
True or False
3.) A posterior pelvic tilt and flat back may allow a running or
jumping athlete to increase hip extension and apply force over a
longer period of time, thus enhancing performance.
True or False
4.)...
1. Elevated levels of plasma HDL cholesterol may be associated with lowered risk of coronary heart...
1. Elevated levels of plasma HDL cholesterol may be associated
with lowered risk of coronary heart disease. Several studies have
suggested that vigorous exercise may result in increased levels of
HDL cholesterol. To investigate this theory, researchers measured
HDL concentrations (mg/dL) in middle-aged (35-66 years) marathon
runners, as well as inactive men. The data are summarized below.
(Assume equal population variances in the two groups.)
sample size mean st. dev
Inactive men 70 43.3 14.2
Marathon runners 70 52.8 14.3...
1) High blood pressure has been identified as a risk factor for heart attacks and strokes....
1) High blood pressure has been identified as a risk factor for
heart attacks and strokes. The proportion of U.S. adults with high
blood pressure is 0.3. A sample of 81 U.S. adults is chosen.
a) What is the sampling distribution of?
pˆ
b) Find the probability that the proportion of individuals in
the sample who have high blood pressure is between 0.24 and
0.35.
c) Find the probability that less than 26% of the people in the
sample have...
Cholesterol levels are measured for 15 heart attack patients (two days after their attacks) and 27...
Cholesterol levels are measured for 15 heart attack patients
(two days after their attacks) and 27 other hospital patients who
did not have a heart attack. The sample of heart attack patients
had a mean cholesterol level of 233.7 and standard deviation 44.9.
The sample of other hospital patients had a mean cholesterol level
of 206.6 and standard deviation 14.8. The degrees of freedom for
the t-distribution, in this case, is df=16.
The doctors leading the study think cholesterol levels...
1. High cholesterol levels are known to be a major factor in the development of heart...
1. High cholesterol levels are known to be a major factor in the
development of heart disease. A study was conducted to compare the
cholesterol levels of men and women in a similar age group. Random
samples of males and females in this age group were taken from the
general population and their cholesterol levels were measured.
Partial results from the study are given below.
Sample Size Male 80 Female 75
Sample Mean 192, 195
Sample Stdev 40.2, 37.5
(a)...
Frank- has high blood pressure. Blood pressure is affected by heart rate (higher heart rate increases...
Frank- has high blood pressure. Blood pressure is affected by
heart rate (higher heart rate increases pressure), vasomotor tone
(more vasoconstriction increases pressure), and blood volume (we
will not consider this factor in this question)
Of the pharmaceutical (medication/drug) types listed below,
which is/are most likely to help Frank reduce his blood pressure?
For each, EXPLAIN HOW the drug would either help or harm Frank.
A drug that blocks beta-1 receptors
A drug that activates beta-2 receptors
A drug that...
which of the following is a risk factor for heart disease? Total blood cholesterol LDL lower...
which of the following is a risk factor for heart disease?
Total blood cholesterol
LDL lower than 100mg
Vigorous Physical exercise
HDL greater than 60mg
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