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Three HIV treatments were tested for their effectiveness in preventing progression of HIV in children. Of 276 children given drug A, 259 lived and 17 died. Of 281 children given drug B, 274 lived and seven died. Of 274 children given drug C, 264 lived and 10 died. How would you analyze the data? What is your conclusion?
If the population meanis to be estimated to within two days, with 95% confidence, how many outside salespeople should be sample.
An entrepreneur in a developing country owns 10 food carts. He has ten employees to work with these food carts. Let Xi be a random variable representing revenue from cart i (on a particular day), i = 1,..., 10. Xi is approximately normally distrib..
Use a calculator with mean and sample standard deviation keys to find the sample mean percentage x and the sample standard deviation s. (Round your answers to one decimal place.)
Find the players expected winnings if he makes this additional bet when he has the opportunity.
sampling plan for a movie promotion. advertising companies often try to characterize the average user of a clients
The acceptance rate for applicants with similar qualifications is 30% for University X and 55% for University Y. What is the probability that Jim will be accepted by at least one of the two universities?
In a random sample of 512 parents with young children, 275 admitted to spanking their child as a regular form of punishment. Use the classical approach, at a 10% level of significance, to test the sociologist's claim.
Determine the percentage of samples of size 16 that will have mean amounts of coffee within 0.1 ounce of the population mean of 8.2 ounces.
Shown below are rental and leasing revenue ?gures for of?ce machinery and equipment in the United States over a seven-year period according to the U.S. Census Bureau. Use these data to run a linear regression and then forecast the rental and leasi..
in 2011 the price of a business math text rose to 98. this is 11 more than the 2010 price. what was the old selling
The sample mean talk time was 315 minutes with a standard deviation of 24 minutes. Why can we say that the sampling distribution of x is approximately normal?
the probability that a tennis set will go to a tie-breaker is 19. what is the probability that two of three sets will
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