744 Answered Questions for the topic Probability & Statistics

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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Probability & Statistics Probability Probability Problems

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... more
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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... more
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Probability & Statistics Statistics Probability Statistics Question

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?
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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... more
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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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Probability & Statistics Probability Area Integration

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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Probability & Statistics Probability Expected Value Dice

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... more
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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.... more
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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... more
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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... more
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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... more
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Probability & Statistics Statistics Binomial Distribution

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... more
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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... more
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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,... more
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Probability & Statistics Statistics Math Help Math Word Problem

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... more
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Probability & Statistics Math Probability Math Help

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... more
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Probability & Statistics Math Probability Math Help

04/20/16

Expected Value – seller
An insurance company sells a policy for $1000. Based on past data, an average of 1 in 100 policyholders will win a $20,000 claim on a policy, an average of 1 in 200 policyholders will win a $50,000... more
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Probability & Statistics Probability Math Help Math Word Problem

04/20/16

Probability calculations
Probability calculations – exactly one occurrence You are looking for a job. Eventually you get six interviews. In each case you are one of four final candidates for the respective job. Let us... more
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Probability & Statistics Statistics Statistics Question

04/20/16

Probability Question
The barton Company manufactures automobile charge indicator gauges. Under test conditions, these gauges are supposed to read 0 volts. However, some gauges read slightly more than 0 volts and some... more
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Probability & Statistics Probability

04/18/16

help with question
Acme Airlines flies airplanes that seat 100 passengers. From experience, they have determined, on average, 84% of the passengers holding reservations for a particular flight actually show up for... more
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