probability
Assume that 13% of people are left-handed. If we select 10people at random, answer the following questions:
a. What is the probability that there are 3lefties in the group? 
b. What is the probability that there are atleast 3 lefties in the group?
c. Find the expected number of right-handers inthe group.
d. Find the standard deviation of the number ofright-handers in the group.
e. What is the probability that they are not allright-handed?
it would be 1 - P(0 left handers) ... howwould you find P(0 left handers)??
g. What is the probability that the majorityis right-handed?wouldn't this be P (x >= 6) = 1 - P(x<= 5) .. im gettin 1 - 0.999 which can't beright
Homework Answers
f. P(5 righties &5 lefties) = P(5 lefties) (this alreadyimplies there are 5 righties)
g. P(at least 6 righties)
Assume that 15% of people are left-handed. Suppose 16 people are selected at random. Answer each...
Assume that 15% of people are left-handed. Suppose 16 people are selected at random. Answer each question about right-handers below. a) Find the mean and standard deviation of the number of right-handers in the group. b) What's the probability that they're not all right-handed? c) What's the probability that there are no more than 10 righties? d) What's the probability that there are exactly 7 of each? e) What's the probability that the majority is right-handed?
8) Assume that 15?% of people are? left-handed. Suppose 14 people are selected at random. Answer...
8) Assume that 15?% of people are? left-handed. Suppose 14 people are selected at random. Answer each question about? right-handers below. a)find the mean and standard deviation of the number of right-handers in the group. b)what's the probability that they're not all right-handed? c)what's the probability that there are no more than 8 righties? d)what's the probability that there are exactly 6 of each?
Assume that 50% of people are left-handed. If we select 5 people at random, find the...
Assume that 50% of people are left-handed. If we select 5 people at random, find the probability of each outcome described below, rounded to four decimal places: a. There are some lefties (≥ 1) among the 5 people. b. There are exactly 3 lefties in the group. c. There are at least 4 lefties in the group. d. There are no more than 2 lefties in the group. e. How many lefties do you expect? f. With what standard deviation?
NAME: 7. (15 points.) Left-handed people are more prone to accident-related injury than right-handed people Among a certain population of college students, the number of injuries X reported by a...
NAME: 7. (15 points.) Left-handed people are more prone to accident-related injury than right-handed people Among a certain population of college students, the number of injuries X reported by a given student is a Poisson random variable; left-handers (L) report injuries at a handers (R) at a rate of 0.15 per year, 15% of the students are left-handed. rate of 0.25 per year, and right- (a) What is the probability that a randomly selected student is injured exactly twice this...
Assume that 15% of people are left-handed. If 5 people are selected at random, find the...
Assume that 15% of people are left-handed. If 5 people are selected at random, find the probability of each outcome described below. a) Find the probability that there are exactly 2 lefties in the group. (round to four decimals) b) Find the probability that there are at least 3 lefties in the group. (round to four decimals) c) Find the probability that there are no more than 2 lefties in the group. (round to four decimals)
Assume that 13% of people are left-handed. Suppose 8 people are selected at random. Answer each...
Assume that 13% of people are left-handed. Suppose 8 people are selected at random. Answer each question about right-handers below. e) What's the probability that the majority is right-handed?
show your work 1, if right-handed 0, if left-handed. 10. Suppose the probability for a person...
show your work
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1. A certain medical test is known to detect 72% of the people who are afflicted...
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NAME: 7. (15 points.) Left-handed people are more prone to accident-related injury than right-handed people Among a certain population of college students, the number of injuries X reported by a given student is a Poisson random variable; left-handers (L) report injuries at a handers (R) at a rate of 0.15 per year, 15% of the students are left-handed. rate of 0.25 per year, and right- (a) What is the probability that a randomly selected student is injured exactly twice this...
show your work
1, if right-handed 0, if left-handed. 10. Suppose the probability for a person to be right-handed is p. Let X = (a) What distribution does X follow? (b) A scientist selected a random sample of 1000 people. Let Y be the number of people who are right-handed, what distribution does Y follow? (c) This scientist found out that among the 1000 people, 100 are right-handed. He then estimated p to be 0.1. What theorem justifies his conclusion....
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