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Dogs were trained with urine samples from bladder cancer patients and people from a control group who did not have bladder cancer. Results are in the table below. Using a 0.01 significance level, test the claim that the source of the of the sample (healthy or with bladder cancer) is independent of the dog's selections. What do the results suggest about the ability of dogs to detect bladder cancer? If the dogs did significantly better than random guessing, did they do well enough to be used for accurate diagnosis?Sample with cancer Sample w/o cancer
Dog identified subjects as cancerous 22 32
Dog did not identify subject as cancerous 32 282
List the simple events in the sample for this experiment. Assuming that each pair of city council members has an equal chance of being selected, assign probabilities to each simple event.
Discuss three measures of central tendency for the dependent variable. Is this distribution skewed? If so, in what direction? Explain your answer. Why would you NOT attempt to determine the central tendency of the independent variables?
Assuming the manufacturer's claim is true, what is the approximate probability of observing a sample mean of 52 months or less?
Compute the suitable Test Statistic to test hypothesis that the proportion of condominiums that sold within 30 days decreased from 2006 to 2007.
Scores on the Math Achievement Test form a normal distribution with a mean of u = 300 and a standard deviation of a = 100. What score separates the top 10% of the distribution from the rest.
To determine whether there is a difference in the proportion of viewers watching the three channels.
Find the minimum amount of water pumped in 30 days. Let y be the total number of gallons pumped x days after pumping being. Note that (0,0) is on graph of the equation.
A manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. At the end of December, the company wishes to forecast sales for January.
What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?
Interpret the correlation between each set of variables.
he length of time a person spends waiting in a physician's office for an appointment can be a frustrating experience. The results below are the responses of internists from two multispecialty group practices to the following question:
Using any present or past job related data, perform an ANOVA in either Excel or MegaStat. Write your null and alternate hypothesis. Post your ANOVA table. Interpret the results.
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