Percent of marriages end in divorce
Forty-three percent of marriages end in divorce. You randomly select 15 married couples. Find the probability exactly 5 of the marriages will end in divorce.
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What is the probability that at least one has not written an editorial letter while under the influence of alcohol? What is the probability that at least one has written an editorial letter while under the influence of alchol?
The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the coated portion subtracted from the amount of
The waiting time (in minutes) between ordering and receiving your meal at a certain restaurant is exponentially distributed with a mean of 10 minutes. The resturant has a policy that your meal is free if you have to wait more than 25 minutes after
In a certain city, 46% of the people (adults) classify themselves as independent, 30% classify themselves as liberals and 24% as conservatives. In a recent election, 35% of the independent people voted, 62% of the liberals voted, and 58% of the co
Make a scatterplot of the data. Obtain the prediction equation. Perform a complete, appropriate analysis. Discuss your results and conclusions.
The following list is a sampling of the costs of various statistics textbooks used at several colleges. Give the upper confidence limit for a 95% confidence interval estimate for the mean cost of all statistics textbooks. 109.95; 92.00; 96.70; 84.
Consider a string of Bernoulli trials with probability of success equal to p and let Y1 be the number of trials untial the first success and Y2 be the number of trials untial the second success.
For each rule, what is the probability of accepting a shipment containing 20% defective components? For each rule, what is the probability of rejecting a shipment containing 10% defective components?
Give a 95% confidence interval for the difference in the proportions. Calculate for [larger] - [smaller]. What is the lower confidence limit for the 95% CI?
Define Population 1 as male drivers and Population 2 as female drivers and use the critical value approach to test this hypothesis with alpha = 0.05.
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