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Finding the probability selecting a defective item from a collection of items using tree diagram
A shipment contains 15 items of which 3 are defective. Two items are selected at random. What is the probability that exactly one of the two items selected is defective? (It might be helpful to draw a tree diagram.
A state survey investigates either the proportion of 8percent for employees who commute by car to work is higher than it was five years ago.
Formulate an appropriate hypothesis test to examine at the 10% level of significance whether the manager's worries are justified.
Decision making using the Transportation method.
She wants to be 90% confident and be accurate within 5% of the true proportion. Find out the minimum sample size necessary.
Test hypothesis that annual incomes of corporate trainers in areas of more than 500,000 are considerably more than those in areas of less than 100,000. Make use of the 5% level of risk.
How many samples would be needed to create a 99 percent confidence interval that is within 0.02 of true proportion of premium grade fuel-quality failures.
Based on these results, the proportion of the variation in 1993 winnings that is explained by the average number of putts per round and driving distance
Determine the following probabilities: Events A and B are mutually exclusive events defined on common sample space.
Make a stem plot for the men height data. Calculate the five-number summary for the women.
Give an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test.
Based on information, compute the following: Percentage (or portion) of children who watch television less than 6.5 hours a week.
For the sample of men, performance on the simulator task declined by an average of 2.9 points with s = 4.1. Is this a statistically significant change? Use a two-tailed test with = .05.
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