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A test has been developed to detect a particular type of arthritis in individuals over 50 years old. From a national survey, it is known that approximately 10% of the individuals in this age group suffer from this form of arthritis. The proposed test was given to individuals with confirmed arthritic disease, and a correct test result was obtained in 85% of the cases. When the test was administered to individuals of the same age group who were known to be free of the disease, 4% were reported to have the disease. What is the probability that an individual has this disease given that the test indicates its presence?
write a null and alternative hypothesis for the following research question is the amount of time australian children
How do you explain the discrepancy between what you have told him and the conclusion reached by Professors Diaconis and Mosteller?
The probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. What is the probability that the time lapsed between two consecutive trades will be longer than 17 seconds?
Determine the probability that a sample proportion for n=30 is within 0.10 of the true population proportion of 0.40, which represents the proportion of cola drinkers who prefer a Coca-Cola drink.
What amount should you set as the mean amount of coffee to be? dispensed?
Because of the way these customer categories are defined, you would probably expect these mean differences to be positive.- Is this what the data indicate?
When computing a confidence interval with a sample size of 100 and the confidence interval of the sample size decreases to 80?
An average department store sells 350 men's suits per year. The men's suit departments at a particular national chain of stores claim they sell more than the industry average. In 35 of their stores, they sold, on the average, 430 suits per year wi..
The time between arrivals at a drive-through window of a fast food restaurant follows the distribution given below. The service time distribution is also given in the table below. Use the random numbers provided to simulate the activity of the f..
Assuming that = 119.5 ng.ml, test the claim that the mean cotinine level of all smokers is equal to 200.0 ng/ml. Use a 0.05 significance level.
Calculate the descriptive statistics from the data and display in a table. Be sure to comment on the central tendency, variability and shape for each variable.
The revised version of the Minnesota Multiphasic Personality Inventory (MMPI-2) is the most frequently administered self-report personality measure.
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