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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?
You want to make a scatterplot. Which variable would you use as the explanatory variable and which as the response variable? Why? What would you expect to see in the scatterplot? Discuss the likely direction, form, and strength.
Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.
Consider a finite size population for N in which you want to study a variable y that takes a very small value for the first element of the sampling frame
Show that z and iz have the same modulus. How are the graphs of these two numbers related?
The number of messages sent to a computer bulletin board is a Poisson random variable with a mean of 5 messages per hour.
Using the 1% significance level, can you conclude that the claim that all homeowners spend an average of 8 hours or more on such chores during a weekend.
What is the margin of error of µ?? Interpret the results.
consider the experiments first draw a poisson random variable n with parameterlambda. then perform n independent
for a population with a mean of 80 and a sd 12 find the z-score corresponding to each sample mean.m83 for a sample of
the productivity of a factory has been recorded over 10 months together with forecasts made the previous month by the
The fleet of yellow fire trucks made 135,035 runs and had 4 accidents. At α = .01, did the yellow fire trucks have a significantly lower accident rate?
an investigation of the effectiveness of a training program to improve customer relationships included a pre-training
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