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When testing a hypothesis about two population proportions, what conditions concerning the sample sizes and sample proportions must hold? The products of the sample sizes and sample proportions must all be greater than what for the z test to be used?
Comparing proportions from two independent samples involves which test?
Calculate the 95% confidence interval for the true population proportion of consumers who like the ads. Calculate the 90% confidence interval for the true population proportion of consumers who like the ads. You would like your margin of error to be ..
Find the value of the range for the exam scores.- Use the value of the range to estimate the value of the standard deviation.
the heights and weights of 11 men between the ages of 21 and 26 were measured. the data are presented in the table
In a sample of 100 homes, local officials find that 14 had termites less than 1 year after being treated. At the 0.05 level of significance, evaluate the credibility of the exterminator's statement.
although delays at major airports are now less frequent it helps to know which airports are likely to throw off your
Compute the expected number of cars arriving using the expected value formula. Compare results obtained from the simulation.
Generalize the above result to show that if {fi; i ∈ I} is a family of convex functions and supi ∈ I fi(x) ∞ for every x then supi∈I fi is also a convex function.
Define the events of interest. In particular, what events are associated with marginal performance? (b) What is the probability that exactly one tunnel fails?
past experience shows that ever new book by a certain publisher captures between 4 and 12 of the market. what is the
A sample of 25 production employees has been tested twice on a standard test of manual dexterity. The average change in the time required to finish the test was a decrease of 1.5 minutes, with a standard deviation of 0.3 minutes. At the 0.05 level..
the proportion of public accountants who have changed companies within the last three years is to be estimated within
Test the null hypothesis that the unemployment rates in both cities are equal versus the alternative hypothesis that they are not equal. What is the p-value? State your conclusion.
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