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Studies have shown that 1 in 10 adults have heart disease. Probability of a person with heart disease having a positive EKG test= 0.90 Probability of a person without heart disease having a negative EKG test= 0.95
Assume a person arrives to the emergency room with chest pains and they are given an EKG test.
1. If the test is positive, what is the probability that this person actually has heart disease?
2. If the test is negative, what is the probability that this person actually does NOT have heart disease?
3. Suppose the first EKG test is positive. In order to make sure, a second EKG test is given to the person. What is the probability that this person has heart disease if the second EKG test is also positive?
4. Suppose the first EKG test is positive. In order to make sure, a second EKG test is given to the person. What is the probability that this person has heart disease if the second EKG test is negative?
Identify the sampling distribution to be used: the standard normal distribution or the Student's t distribution. Find the critical value(s).
Someone gives you 10 to 1 odds that you cannot roll a double number with the roll of a pair of dice. You win $10 if you succeed and you lose $1 if you fail. What is the expected value of the game for you? What can be expected if you play 100 times..
Mean=63.6 Standard deviation=2.5 If 36 data points are arbitrarily chosen, determine the probability that mean is less than 64.
Develop three regression models to predict the selling price based upon each of the other factors individually. Which of these is best?
Computing probability values using normal distribution - How many students earned between $20,000 and $40,000
Suppose that past data are not available for developing a planning value for p; therefore, you will use p = 0.050 for the planning average.
In summer 2000, a growing number of warranty claims on Firestone tires sold on Ford SUVs prompted Firestone and Ford to issue a major recall. An analysis of warranty-claims data helped identify which models to recall.
Twenty three percent of automobiles are not covered by insurance. On a particular weekend, 35 automobiles are involved in accident.
Crystal Ball requires the following steps:
Using this information, calculate Blpha risk (probability of Type II error) if the true population mean really is 81.
Standard error for regression equation - determination and non determination and explain the meaning of each.
In study of a clinical for an allergy drug 115 of the 204 subjects reported experiencing important relief from their symptoms.
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