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Suppose that among workers exposed to asbestos in a shipyard in 1980, 33 died over a 10-year period from COPD, whereas only 24 such deaths would be expected based on statewide mortality rates. Is the number of deaths from COPD in this group excessive?
Describe a different example of where the independent variable, while highly correlated to the dependent variable, does not cause the dependent variable to change directly.
Use PHStat to make a box-whisker plot. If PHSTAT has yet to be installed, calculate Xmin, Xmax, Q 1 , Q 3 and median using equation in Class Notes-Quartiles, Percentile & Dectiles.
If a card is drawn at random from a standard 52-card deck, what is the probability that the card drawn is one of the following?
What is the expected number of Republicans who will win office in the coming election?
A committe studying employer-employee relations proposed that a rating system be adopted. Each employee would rate his or her inmediate supervisor and in turn the supervisor would rate each employee.
Taking α to be 0.05, what is/are the critical values associated with testing your hypothesis?
What is the null and alternative hypothesis? What is your final conclusion?
Below are two data sets. Using descriptive statistics, discuss the two data sets in relation to each other. Both data sets come from an operation where potato chips are being placed in small connivance store bags that are to hold 6.0 oz.
Three companies are attempting to sell you a pollution reduction additive to your chemical waste. Given limited resources, which prevents you from developing the additive yourself, you get each company to give you a sample to the product.
Assume that the number of left-handers is a binomial random variable. (Refer to the formula for mean and standard deviation for binomial prob. Distribution)
Find the relative risk for moderate beer drinkers as compared to nondrinkers, finds the 95% confidence interval
Suppose you bid $12000. What is the probability that your bid will be accepted?
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