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Experts consider high serum cholesterol levels to be associated with an increased incidence of coronary heart disease. Suppose that the natural logarithm of cholesterol levels for males in a given age bracket is normally distributed with amean of 5.35 and a standard deviation of .12.
a. What percentage of the males in this age bracket could be expected to have a serum cholesterol level greater than 250 mg/ml, the upper limit of the clinical normal range?
b. Based on your answer to part (a), does it appear the ad was successful? Explain.
To forecast attendance at an yearly tennis tournament a model has been developed that uses attendance from the previous year and the amount spent for advertising this year.
based on the cell phone usage data what is the most economical individual plan?69.99 unlimited monthly1.99day
Suppose that beer consumption and religious affiliation are not independent of each other. That means that
1. other things being equal as the sample size increases the standard error of a statistica. increasesb.
two friends are training for the boston marathon. james is training on a hilly jogging loop. forthe general population
In CaliforniaSpeeding.jmp are recorded speeds (in miles/hour) of a randomly selected sample of cars traveling on a section Highway 405 in Los Angeles (based on data from Sigalert)
q1. a multiple-choice test has 6 questions. there are 4 choices for each question. a student who has not studied for
An experimental surgical procedure is being studied as an alternative to the old method. Both methods are considered safe. Five surgeons perform the operation on two patients matched by age, sex, and other relevant factors
in an opinion survey a random sample of 1000 adults from the u.s.a. and 1000 adults from germany were asked whether
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
the distribution of the annual incomes of a group of middle management employees approximated a normal distribution
State the appropriate null and alternative hypothesis for the following case: The examinations in a large freshmen chemistry class are scaled after grading.
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