760 Answered Questions for the topic Probability & Statistics
Probability & Statistics
06/01/16
How can I Sketch the graphs of F(x) and f(x)
The distributon function for the duration of a certain soap opera is F(x)=1-(16/x^2) , x> or equal 4 and F(x)=0 x<4 and the f(x)=32/x^3 , x> or equal 4 and f(x)=0 for x<4. How can I...
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05/30/16
How can I know this problem talk about conditional probability , permutation, or combination ,Do you have any techniques for this .
How can I know this problem talk about conditional probability , permutation, or combination ,Do you have any techniques for this .always my teacher gives us problem , and it does not have any...
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05/29/16
The distributon function for the duration of a certain soap opera (in tens of hours) is F(x)=1-(16/x^2) , x> or equal 4 and F(x)=0 x<4
The distributon function for the duration of a certain soap opera (in tens of hours) is F(x)=1-(16/x^2) , x> or equal 4 and F(x)=0 x<4 a)calculate f the probability density functon of the...
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Probability & Statistics
05/26/16
An average of 0.5 ship per day arrives at a certain deck.what is probability that after the departure of ship four days will pass before the arrival of next shi
An average of 0.5 ship per day arrives at a certain deck.what is probability that after the departure of ship four days will pass before the arrival of next ship?
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Probability & Statistics
05/23/16
Lorena has 4 hats, 11 blouses, and 9 skirts. How many different outfits can Lorena create?
Lorena has 4 hats, 11 blouses, and 9 skirts. How many different outfits can Lorena create?
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05/20/16
problem solving by conditional probability
conditional probability
Professional athletes who play in the NLF are subject to random drug tests. Suppose the probability that the test shows a positive result given that the athlete is...
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Probability & Statistics Statistics
05/20/16
HELP!! Find the probability that at least two students in the class have same bdays
A biology class has 3535 students. Find the probability that at least two students in the class have the same birthday. For? simplicity, assume that there are always 365 days in a year and that...
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05/18/16
Let P(A)=P(B)=0.42 and P(AnB)=0.13 Find P(A'?B')
Let P(A)=P(B)=0.42 and P(A∩B)=0.13
Find P(A'∪B')
solution
P(A'∪B')=P(A)+P(B)-P(A∩B)
=0.42+0.42-0.13=0.71
Is it correct?
Probability & Statistics
05/16/16
Find the conditional distribution
Suppose that(i) ε ∼ N (0, σ2);(ii) X ∼ N (µ, τ 2);(iii) ε ⊥⊥ X;(iv) Y = α + β X + ε.(a) Find the conditional distribution of Y given X = x.
the solution is: Y |X = x ∼ N (α + β x, σ2)
But, to...
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Probability & Statistics
05/14/16
how many passwords are possible if three letters are followed by two digits
probabilities and statistics
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Probability & Statistics
05/07/16
probability and statistics
3 cards are drawn randomly from a deck of 52 cards. What is the probability that at least one is a heart and one is a king?
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05/06/16
A PDF is given by formula p(x)=2e^(-2x),x>0. Determine P(X>1).?
A PDF is given by formula p(x)=2e^(-2x),x>0. Determine P(X>1).? PDF being Probability Density Function
A PDF is given by formula p(x)=2e^(-2x),x>0. Determine P(X>1).?
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05/06/16
Determining Probability from Expectation
A gambler is playing with a crooked(unfair) twelve-side die. The chances that certain side of a die will turn up is given in the table below, except for P5 and P6. Find P5 and P6 if it known that...
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Probability & Statistics
05/06/16
I need help with this probs and statistics question
A baseball franchise finds that the attendance at its home hames has a mean of 16000 and a standard deviation of 4000. What percent of the home games have attendances between 12000 and 20000 people?
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Probability & Statistics
05/05/16
Compute the probability of answering 8 or more questions correctly by calculating the probability with a direct sum and by using complements.
I did most of the work but I need some help on the last few questions! Thank you in advance!
Mrs. Hudson plans to give a 10 question multiple choice exam in which each question has 4 options....
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Probability & Statistics
04/30/16
probability
question:
a film distribution manager calculates that 7% of the films released are flops. If the manager is accurate, what is the probability that the proportion of flops in a sample of 638...
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Probability & Statistics Probability
04/30/16
Question in description
The probability that a randomly selected 2 year old male garter snake will live to be 3 years old is 0.83344. What is the probability that two randomly selected 2 year old male garter snakes will...
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Probability & Statistics Applied Stats
04/30/16
What is the population?
Results are based on telephone interviews conducted February 29th- March 15, 2016, with a random sample of 3,072 U.S college students, aged 18-24, who are currently enrolled full time and four-year...
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04/29/16
find the probability of guessing correctly at least 6 of the 10 answers on a true or false examination.
the correct answer is 193/512
please explain and show all working. thanks very much!
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Probability & Statistics
04/29/16
If 20% of the group of 200 receive a free pass to Walt Disney World, what are the odds of receiving a free pass to Disney?
Probability
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Probability & Statistics
04/29/16
How many distinct license plates of this type are possible
A typical West Virginia license plate follows the pattern 4PC609, where the first, fourth, fifth, and sixth characters may be any of the decimal digits 0 through 9 inclusive, and the second and...
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Probability & Statistics
04/27/16
The mean age at which men in the United States marry for the first time follows the normal distribution with a mean of 24.1 years. The standard deviation of the
The mean age at which men in the United States marry for the first time follows the normal distribution with a mean of 24.1 years. The standard deviation of the distribution is 2.5 years. For a...
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04/24/16
If a marble is chosen at random, which of the conditional probabilities is larger, P(red|large) or P(large|red)? URGENT
A jar contains 11 large red marbles, 4 small red marbles, 8 large blue marbles, and 6 small blue marbles. If a marble is chosen at random, which of the conditional probabilities is larger,...
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04/21/16
Math probability
the probability that a student is in honors given that he or she is in mrs rollins class is 28/51. the probability that a student is not in ms rollins class given that he or she is not in honors is...
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04/20/16
Expected Value - buyer
You can buy a lottery ticket for $1000. The odds are as follows:
1 in 10 tickets will pay $500.
1 in 100 tickets will pay $1000.
1 in 1000 tickets will pay $200,000.
1 in 10,000 tickets will...
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