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Composite sampling is a way to reduce laboratory testing costs. A public healthdepartment is testing for possible fecal contamination in public swimming pools. In thiscase, water samples from 5 pools are combined for one test, and further testing isperformed only if the combined sample shows fecal contamination. Based on pastexperience, there is a 3% chance of finding fecal contamination in a public swimmingarea. What is the probability that a combined sample from 5 swimming pools has fecalcontamination? Recall that P(A) +P(not A) = 1.0.
A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400.
Suppose a large sample is selected (instead of just 10). About 95 percent of the predictions regarding sales would occur between what two values?
Explain what these terms mean in describing the distribution of the sales reps' salaries.
What is the difference between the probability value and the significance level? Please, also provide examples.
The negotiation will end successfully? After 4 hours? After 8 hours? How does the precentage likelihood of a successful negotiation change over the course of time?
Solve different inventory control problems using an appropriate OR method.
What is the probability that a single, randomly selected piece of material will be defective? (Give the answer to two decimal places.)
A population is normally distributed, with a mean of 23.45 and a standard deviation of 3.8. What is the probability of each of the following?
Of the 500 surveyed, 350 said they would vote for the Democratic incumbent. Using the 0.99 confidence coefficient, what are the confidence limits for the proportion that plan to vote for the Democratic incumbent?
Using your simulation results calculate an estimate of the probability that the sum of the dice is 10 and the player is dealt three cards that can be put in sequence.
Comment on your statistical findings? Do you agree with your initial statement regarding the preference of an ANOVA over a t-test when examining more than two groups?
One of the most commonly used statistical techniques is the comparison of two means, also known as the t-test (for this you need quantitative, or interval level data).
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