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Suppose that you wanted to determine if the males in your sales force differed from the females in your sales force in the proportion of sales that they made to the mass merchandiser chains. Your data show that the 80 males had 40% of their sales to these chains, while the 60 females had 25% of their sales to these chains. For these data, the standard error of the difference in proportions is approximately
A certain police officer stops cars for speeding. The number of red sports cars she stops in one hour is a Poisson process with rate 4, while the number of other cars she stops is a Poisson process with rate 1.
1.as part of a promotion for a new type of cracker free trial samples are offered to shoppers in a local supermarket.
Neither married nor a college graduate? (answer should be a probability, that is, a number between 0 and 1). Married but not a college graduate? (answer should be a probability, that is, a number between 0 and 1).
Create a 98 percent confidence interval for the population mean.
In a group of college students there are 200 women, 10 of whom smoke. There are 150 men, 32 of whom smoke. Calculate the probability a randomly selected student is a woman or a smoker.
Can we conclude there is a difference in mean number of surgeries performed by hospital or by day of week?
during the 2010 world cup group stage my friend manmood wanted me to pay him 5 if brazil beat portugal. at the time i
When would you use a two population test with a small sample size at your place of employment, in your education, or in politics?
The weights of the contents of cereal boxes are normally distributed, with a mean weight of 12 ounces and a standard deviation of 0.05 ounce. The weights of four cereal boxes selected at random are 12.01 ounces, 11.92 ounces, 12.12 ounces, and 11...
The following table is from the Social Security Actuarial Tables. For each age, it gives the probability of death within one year, the number of living out of an original 100,000 and the additional life expectancy for a person of that age.
Find the standard error of the difference in sample means,
The relative frequency distribution of the number of TVs sold in a day in a department store in the last year is as follows: Compute the mean and standard deviation of this distribution.
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