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Finding the probability for the given set of information
Suppose a rare disease infects one out of every1000 people in a population. Suppose there is a good, but not perfect test for this disease: if a person has the disease, the test comes back positives 99 percent of the time. However, the test also produces some false positives: 2 percent of uninfected people also test positive. what are the probability of you having the disease?
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
What is the probability that a sample mean will be within plus-or-minus two of the population mean for each of the following sample sizes?
he population consists of all 15 year olds living in the attendance district of a local high school. You plan to obtain a simple random sample of 200 such residents by using the roster of the high school as the sampling frame.
State the hypotheses for a right-tailed test.
The following data represent the cost of electricity for the period of July 2008 for a random sample of 50 one-bedroom apartments in a large city.
Formulate an appropriate hypothesis test to examine at the 10% level of significance whether the manager's worries are justified.
Paul has calculated the indifference probability for the lottery having a payoff of $160K with probability p and -$80K with probability (1-p) as follows:
A stationery store wants to estimate the mean retail value of greeting cards that it has in its inventory. A random sample of 100 greeting cards indicates a mean value of $2.55 and a standard deviation of $0.44.
Evaluate the standard deviation - use the conservative value for the degrees of freedom, Assume the two groups are independent and the data are approximately Normal. Let µ 1 and µ 2 represent the mean heart rates we would observe for the entire po..
Let independent variable x represent years since 1950. Determine quadratic regression model for per capita cigarette consumption.
Find the percentage of the total variation that cant explained by the linear relationship between the two variable.
Testing equality of two means - difference in performance of the two gasolines and difference in gasoline mileage output
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