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A Drug Company is developing a new pregnancy-test kit for use on an outpatient basis. The company uses the pregnancy test on 100 women who are known to be pregnant, for whom 95 test results are positive. The company uses the pregnancy test on 100 other women who are known to not be pregnant, of whom 99 test negative.
a. What is the sensitivity of the test? Define Sensitivity.
B. What is the specificity of the test? Define Specificity.
The company anticipates that the women who will use the pregnancy-test kit, 10% will actually be pregnant.
C. What is the PV+ of the test?
The city of Oakdale wishes to see if there is a linear relationship between the temperature and the amount of electricity used (in kilowatts).
Determine the range of values containing 50% of the population of x. From a large sampling (N>5000), we find that x has a mean value of 5.2 units and a standard deviation of 1.0 units.
A file cabinet manufactor estimates that 5% of it's file cabinets will have drawers that close improperly. Assume a production of 120 cabinets is completed. What is the mean and the standard deviation of this distribution?
A sample of 46 homes in a subdivision revealed that 20 were ranch style (as opposed to colonial, tri-level, or Cape Cod). Construct a 98 percent confidence interval for the true proportion of ranch style homes.
Super Markets, Inc. is considering expanding into the Scottsdale, Arizona, area. Ms. Luann Miller, Director of Planning, must present an analysis of the proposed expansion to the operating committee of the board of directors.
Show the sampling distribution of the mean amount of Medicare spending for a sample of fifty 2003 enrollees. What is the probability the sample mean will be within, plus or minus, $300 of the population mean?
Find a value of p such that when 10,000 bits are received, the expected number of errors is at most 10 and Compute E(U(X)) and note for which values of k this converges. What property does U have for these values of k.
A friend of mine is giving a dinner party. His current wine supply includes 12 bottles of zinfandel, 10 of merlot, and 8 of cabernet. If he wants to serve 3 bottles of zinfandel and serving order is important, how many ways are there to do this?
He observes how many people play on each court on a particular day. Compute the expected value for the data shown below.
A fair die is rolled until win or loss occurs: For k=1 to 5: if a 6 occurs on the kth roll you win N dollars and game ends; if a number
Cables is selected and tested find the sample mean that will cut off the upper 95% of all the sample of 20 taken from the population. Assume the variable is normally distributed.
Management announce an incentive pay for the top 30% producers. what is the minimum number of units that a worker should produce in order to qualify for the incentive pay?
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