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A study considered risk factors for HIV infection among 500 intravenous drug users. Previous studies have shown that 45% of intravenous drug users are HIV positive.
1. What is the probability that 210 to 235 intravenous drug users in this study will be HIV positive.
2. What is the probability that at most 230 intravenous drug users in this study will be HIV positive
Is P(K + 1) = P(K)(365-K)/365 and, If so, why? Find the smallest class size K for which the probability that two or more students have the same birthday exceeds 0.5.
the stewart aviation products company has been successfully manufacturing aircraft al- timeters with errors normally
If it were known that Project B was negatively correlated with other cash flows of the firm whereas Project A was positively correlated, how would this knowledge affect the decision?
During the last hour, a telemarketer dialed 20 numbers and reached 4 busy signals, 3 answering machines, and 13 people. Use this information to determine the empirical probability that the next call will be answered in person.
1. of 1906 people who came into a blood bank to give blood 300 people had high blood pressure. estimate the probability
explain how do you declare a variable as binary or integer in excel solver?1.briefly explain the results of a what-if
For the following independent random samples, use the z-test and the 0.01 level of significance in testing Ho:u1 = u2 versus H1:u1 = u2.
a mail order company has an 8 success rate. if it mails advertisements to 600 people find the probability of getting
the life expectancy of a common brand of battery is normally distributed with a mean of 400 hours and a standard
At some vacation destinations, "all-inclusive" resorts allow you to pay a flat rate and then eat and drink as much as you want. There has been concern about whether these deals might lead to excessive consumption of alcohol by young adults on spri..
Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time?
A population of scores has m=50 and o=10. If 5 points are added to every score in the population, then the new mean and standard deviation would be:
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