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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
Rhode Island Red Chickens the incubation time for Rhode Island Red chicks is normally distributed to find out the number of chicks we expect that will hatch.
Determine the most economical monthly shipping schedule. Provide a table showing the routes and total costs.
If you are told a population has a mean of 25 and a variance of 0, what must you conclude? a) Someone has made a mistake. b) There is only one element in the population.
A sample of 23 European countries found that variance of life expectancy was 7.3 years. Determine the 95% confidence interval estimate for variance of life expectancy in Europe?
The severity of side effects experienced by patients while being treated with a particular medicine is under study. The severity is measured on the scale: none, mild, moderate, severe, very severe.
A statistics practitioner conducted a two-factor analysis of variance experiment with a =4, b = 3, and r = 8. The sum of squares are listed here:
Lemon Corporation, an automobile manufacturer, is trying to determine the source of defects in some of its autos.
We can think of this as the value of mew that maximizes f(y), the probability that our observed value of y occurs.
What is a point estimate for the population mean µ?
It takes between 6 to 7.5 hours to drive from Panama City to Boquete, and the drive time is uniformly distributed.
You are given an annual time series with 40 consecutive values and asked to fit a fifth-order auto-regressive model.
A prison official wants to estimate the proportion of cases of recidivism. In examining 250 convicts there are 65 cases. with 99% confidence interval what is the range? How do you figure this type of problem?
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