744 Answered Questions for the topic Probability & Statistics
10/10/15
Probability help.
11% of all widgets are defective an inspector randomly sample 14 from a box. What is the probability of finding at least 2 defective widgets?
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Probability & Statistics
10/09/15
How do I find the probability of P(O given +) for this?
In the UK, 35% of the population are group A+, 8% are B+, 3% are AB+, 37% are O+, 7% are A-, 2% are B-, 1% are AB- and 7% are O-. A random sample of 9 people in the UK who are Rhesus + is taken....
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Probability & Statistics
10/08/15
A secretary has typed five letters to five different people, an addressed an envelope for each letter. The letter is put into the letter at random.
How many different assignments of letters to envelopes are possible? What is the probability that each person receives the correct letter?
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10/08/15
Stat probability help!
Suppose we roll an ordinary balanced six-sided die Let A = {1,2}, B = {2, 5}, C = {2, 4, 6}
What is P(A ∩ B ∩ C)
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Probability & Statistics
10/08/15
what is the binomial probability of P(1 < X = 3) when n= 7 and p=.4
what is the binomial probability of P(1 < X ≤ 3) when n= 7 and p=.4
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10/08/15
Suppose there is a 0.16 probability your roommate will forget to mail it. Should your roommate mail your letter, there is a 0.9 probability that post office wi
You ask your roommate to mail a letter for you. Suppose there is a 0.16 probability your roommate will forget to mail it.Should your roommate mail your letter, there is a 0.9 probability that post...
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10/07/15
An instructor gives his class a set of 13 problems with the information that the next quiz will consist of a random selection of 5 of them.
An instructor gives his class a set of 13 problems with the information that the next quiz will consist of a random selection of 5 of them. If a student has figured out how to do 11 of the...
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Probability & Statistics
10/05/15
Probability
A city council consists of five Democrats and eight Republicans. If a committee of five people is selected, find the probability of selecting two Democrats and three Republicans.
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Probability & Statistics
10/05/15
Probability
Katrina, Kim, Sarah, Larry, Maria, Ian, Jim, and Sergio have all been invited to a dinner party. They arrive randomly and each person arrives at a different time.
a. In how many ways can they...
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10/05/15
Probability help!!
A biologist finds that 20% of fruit flies have short wings and 26% have eye defects. Assuming these two events are independent what is the probability that a randomly selected fruit fly has neither...
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Probability & Statistics Statistics
10/01/15
Statistics question
A geologist collects hand specimen sized pieces of limestone from a particular area. A qualitative assessment of both texture and color is made with the following results. Is there evidence of...
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Probability & Statistics Analysis
09/30/15
statistics help
The number of fatal car crashes per day in Houston is shown in the table below. Let X be the random variable representing the number of fatal crashes. Find P(X < 2). Hint: convert the table to a...
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Probability & Statistics
09/30/15
I need confirmation?
A bag contains four marbles. One marble is blue, one is red, one is white, and one is yellow. Two marbles are draw from the bag by removing one marble and then, without replacing the first marble,...
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Probability & Statistics
09/11/15
Compute probability of each of the following events: event a the sum is greater than 8 event b the sum is divisible by 5
An ordinary die is a cube with the numbers 1 through 6 on the sides. Imagine such a die is rolled twice in succession and that the face values of the two rolls are added togethe. The sum is...
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Probability & Statistics
09/09/15
Let S = {a,b,c} be a sample space for an experiment. Suppose P{a}=1/2, P{b}=1/3, and P{c} = 1/6.
Let S = {a,b,c} be a sample space for an experiment. Suppose P{a}=1/2, P{b}=1/3, and P{c} = 1/6.list the events for the experiment. (Hint: you should find 8)Calculate the probabilities for each of...
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Probability & Statistics
08/31/15
Probability question: Cards
Suppose that you select 2 cards without replacement from a standard deck of 52 playing cards. If the first card that you select is a club, what is the probability that the second card that you...
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Probability & Statistics
08/29/15
probability
A bag contains four marbles. One marble is blue, one is red, one is white, and one is yellow. Two marbles are draw from the bag by removing one marble and then, without replacing the first marble,...
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Probability & Statistics Probability Problems
08/24/15
probability homework
the probability that an exam coverage will be about chapter 1 is 0.45, the probability that it will cover chapter 2 is 0.63 and the probability that it will cover either chapter 1 and 2 or both is...
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Probability & Statistics
08/19/15
A multiple-choice quiz has 10 questions. Each question has five possible answers.
Question Continued: Carman is certain that she knows the correct answer for Questions 1 and 4. If she guesses on the other questions, determine the probability that she passes the quiz.
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Probability & Statistics
08/19/15
Mr Adam and Mr Ouyang interviewed 75 students and found that 35 were in favor of changing date for Exam
a)If Mr Persaud selects 5 students and surveys them, what is the probability that more students are in favor of changing the date?
b)What is the expected number of students who want Exam date...
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Probability & Statistics
08/19/15
A drawer contains four Kit Kat and five Aero candy bars. Two bars are drawn from the bag without replacement.
Create a probability distribution in which the random variable represents the number of Kit Kats.
Determine the expected number of Kit Kat if two chocolates are drawn from the bag without...
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Probability & Statistics
08/18/15
If four decks of cards are shuffled together, what is the probability of dealing a 13-card hand you have exactly two black Queens?
a little confused with this question any help would be appreciated!
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08/12/15
Trule/False Questions. Statistics
1: p-value is the probability of obtaining a sample result at least as extreme as that which was observed, assuming the null hypothesis is true.
2:An experiment is necessary to establish a...
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Probability & Statistics
08/11/15
.276 is population proportion with a random sample of 400 Kentucky residents
Determine the probability of obtaining a sample proportion of Kentucky smokers that is more than .025 away from the population proportion (in other words, either greater than .301 or less than...
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Probability & Statistics
08/08/15
80% of customers pay by credit card find the probability that (i)exactly two pay by credit card..(ii)less than three pay by credit card
to find probability
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