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Six balls are to be randomly chosen from an urn containing 8 red, 10 green, and 12 blue balls.
(a) What is the probability at least one red ball is chosen?
(b) Given that no red balls are chosen, what is the conditional probability that there are exactly 2 green balls among the 6 chosen?
If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
the smoking rate for the entire u.s. population of adults is 32 national institute on drug abuse. suppose that for a
A random sample of 168 students was asked how many songs were in their digital music li- brary and what fraction of them was legally purchased. Overall, they reported having a total of 117,079 songs, of which 23.1% were legal. The music industry w..
eu european union countries report that 46 of their labor force is female. the united nations wants to determine if the
a study was conducted with vegetarians to see whether the number of grams of protein each ate per day was related to
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.50 inches.
Test whether there is evidence that Abigail's distributors are violating her edict that X = 1000.
At 0.05 level significance, is there evidence of the difference in proportion of dvds purchased on basis of the kind of media used (Mailing, E-Mail)?
which of the following is not a requirement for regression analysis?a outliers can have a strong effect on the
A researcher conducts an independent measures research study and obtains t= 2.070 with df= 28. How many individuals participated in the entire research study?
According to BusinessWeek, many Japanese consider their cell phones toys rather than tools.14 If a random sample of 200 Japanese cell phone owners reveals that 80 of them consider their device a toy, calculate a 90% con?dence interval for the pop..
Probability of a person being blood type b is 13%. What is the probability that 4 unrelated people in random selection will all be type b?
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