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A medical study recorded the following information on 75 randomly chosen subjects. In the space provided, describe the variable type as qualitative or quantitative. The variable level will be ordinal, nominal, continuous or discrete;
Weight (pounds)
Race (white, black, Asian, Hispanic, Native American)
Number of doctor's visits in the past year
Smoker (yes/no)
Body Temperature oF
Income level (very low, low, medium, high, very high)
What is the predictive value of a negative test result? In other words, what is the probability that an individual who returns a negative tests for hypertension is not hypertensive? Please give your answer to 3 decimal places.
You receive another question asking how the overall probability of winning a prize in the Powerball lottery is determined. The overall probability of winning a prize in the Powerball lottery is 1 /35. Write an explanation that answers the question an..
In your research, you may find that you must compare the means of two sample populations related to one particular variable. For example, you may have population samples from two ethnic groups that you wish to compare against income level. In these c..
the probability is 1 in 4 million that a single auto trip in the US will result in a fatality. Over a lifetime, an average driver takes 50,000 trips. What is the probabiltiy of a fatal accident over a lifetime. Explain.
Population and the sample proportion of grandparents as primary caregivers (-hat) is to be calculated. What is the mean of the sampling distribution of -hat?
A manufacturer of 35-mm cameras knows that a shipment of 30 cameras sent to the large discount store contains 8 defective cameras. The manufacturer also knows that the store will choose two of the cameras at a random, test them, and accept the shi..
A wholesaler has recently developed a computerized sales invoicing system. Prior to implementing this system, a manual system was used. The distribution of the number of errors per invoice for the manual system is as follows
Create a histogram showing the distribution of symptom scores in this sample. Is this a skewed distribution? If so, is it skewed to the left or to the right?
British scientists have developed a 15 minute brain scan they hope could be used to detect autism in children. Autism and related disorders affect up to 7 out of every 1000 individuals.
Developing a linear programming problem using Commuter Bus scheduling to minimize the total cost.
Create a frequency distribution and histogram for this variable, and calculate the mean, median, and standard deviation. Describe how BankTen compares with other banks in terms of profits per employee.
Is this result adequate to conclude that monkeys spent significantly more time with softer mother than would be expected if there were no preference? Use the two-tailed test with α = .05.
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