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One important aspect of medical diagnosis is its reproducibility. Suppose that two different doctors examine 100 patients for dyspnea in a respiratory disease clinic and that doctor A diagnosed with 15 patients as having dyspnea, doctor B diagnosed 10 patients as having dyspnea, and both doctor A and B diagnosed 7 patients as having dyspnea.
Compute the kappa statistic and its standard error regarding reproducibility of the diagnosis of dyspnea in the clinic.
An orange juice producer buys only one kind of oranges. The amount of juice squeezed from each of these oranges is approximately normally distributed with a mean of 4.2 ounces and a population standard deviation of 1 ounce.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
a) What statistical test should be used to analyze these data? b) Identify H0 and Ha for this study. c) Conduct the appropriate analysis d) Should H0 be rejected? What should the researcher conclude?
Computing the probability values using normal distribution - what proportion have SAT scores greater than 550?
Predict with 95% confidence the test score at a school where 50% of the mathematics teachers have mathematics degrees, the mean age is 43, and the mean annual income is $48,30.
Compute expected value for each of three actions and find out if manager must accept, further analyze, or reject the lot? Determine expected value of perfect information (EVPI)?
A store manager wishes to find out whether there is a relationship between the age of her employees and the number of sick days they take each year. The data for the sample are shown below:
By using standard normal table, determine critical value (or values) for= 0.14 right-tailed test.
Determine the probability of randomly selecting a person graduating with Master's degree who didn't major in Education.
What is the major difference between finding significance and confidence intervals using population samples or using population proportions?
Suppose that you are the director of table game operations at a large casino, known especially for its poker room. You are interested in determining the average number of hands the casino should expect per hour during peak hours in the poker room.
What are the hypotheses we would want to test for the Kleenex case?
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