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According to a study published by a group of University of Massachusetts sociologists, approximately 60% of the Valium users in the state of Massachusetts first took Valium for psychological problems. Find the probability that among the next 8 users from this state who are interviewed,
(a) exactly 3 began taking Valium for psychological problems;(b) at least 5 began taking Valium for problems that were not psychological.
What contingency table test is used to see if there is a difference in the frequency distribution for two different groups?
a first is accustomed to training operators who do certain tasks on a production line. those operators who attend the
in a gambling game a woman rolls two fair dice. if she rolls a double 6 she will win 50. if she gets a double other
What is the probability that no HIC country will be included in the sample? What is the probability that "at least one" HIC will be included in the sample? (Note that these two outcomes are complements: "none" and "at least one.")
lifetimes of computer memory chips have gamma distribution with mean mu4 years and variance sigma2163 years. what is
you are rolling a 6-sided die but you dont know whether its fair or not. you know that that are only two kinds of dice
Compute the mean and variance of the following discrete probability distribution. A cola-dispensing machine is set to dispense on average 7.00 ounces of cola per cup. The standard deviation is 0.10 ounces. The distribution of amounts dispensed foll..
Each electric cooker has a variable cost of $200 and a selling price of $300, and each gas cooker has a variable cost of $160 and a selling price of $240. Fixed overheads are $60,000 a week and the company works a 50-week year. The marketing depa..
The null hypothesis is to be tested at 95% confidence. Determine the critical values for this test.
a bridge hand consisting of 13 cards is selected at random from an ordinary deck of cards. let h d c and s be the
For monthly volume of 300 tables, find out total cost, total revenue, and profit.
Take a deck of cards. A deeck has 52 cards with two major colors(Red and Black), with 26 cards each. Red colors comes in two shapes(heart and diamond)
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