8. Find the probability of winning a lottery with the following rule. Select the six winning numbers from 1, 2, . . . , 37.
(In any order. No repeats.)
P(winning)=____
(Type an integer or a simplified fraction.)
9. In designing an experiment involving a treatment applied to 3 test subjects, researchers plan to use a simple random sample of 3 subjects selected from a pool of 57 available subjects. (Recall that with a simple random sample, all samples of the same size have the same chance of being selected.) Answer the questions below.
a. How many different simple random samples are possible?____
B. What is the probability of each simple random sample in this case?____
10. When nine basketball players are about to have a free-throw competition, they often draw names out of a hat to randomly select the order in which they shoot. What is the probability that they shoot free throws in alphabetical order? Assume each player has a different name.
P(shoot free throws in alphabetical order)=___
(Type an integer or a simplified fraction.)
Ans.
(8). Totalnumber of lottery = 37, numbered from 1 to 37
Winning number = 6, i.e. only one winning number out of 37
P(winning) = 1/37 = 0.027
9.(a). Population size, N = 57
and the sample size, n = 3
The total number of samples for
(I). Without replacement
(II). With replacement = 573 = 185193
(b). If the simple random sample is drawn by without replacement then the probability of each sample is = 1/ 29260
(10).
P(shoot free throws in alphabetical order ) = 1/9! = 1/362880
8. Find the probability of winning a lottery with the following rule. Select the six winning...
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