744 Answered Questions for the topic Probability & Statistics

Probability & Statistics Probability Sets Finite Mathematics

02/10/15

What is the value of Pr[E]? What is the value of Pr[F']?
For this problem, assume that S = { O1, O2, O3, O4 } and that w1 = 0.07, w2 = 0.29, w3 = 0.18, w4 = 0.46. Let E = { O1 , O2} and F = { O4 , O3}.
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Probability & Statistics Probability

02/10/15

Probabilty Question
A university's leadership council is made up of members: are students, are teachers, and are deans. A newspaper reporter is planning to select two of the council members for interviews. The first... more
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Probability & Statistics

02/06/15

The lengths of turtles in a park are normally distributed with a mean of 23.2 and a standard deviation of 5.6 inches. what is the percentile rank of a turtle wh
 The lengths of turtles in a park are normally distributed with a mean of 23.2 and a standard deviation of 5.6 inches. what is the percentile rank of a turtle whose length is 15 inches? I use the... more
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Probability & Statistics

02/03/15

If two dice are rolled, what is the probability of getting two numbers greater than 4?
1/3, 1/36, 1/6 or 1/9
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Probability & Statistics

02/03/15

Probability of fishes
Consider a lake full of three species of fish: walleye, bass andperch. The lake contains 800 walleye, 800 bass and 400 perch. (This population is large enough thatyou can consider all samples to be... more
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Probability & Statistics Probability Probability Problems

01/29/15

Someone could help me to solve this problem - Probability Exercise! Thank you!
Over a long period of time in a large multinational corporation, 10% of all sales trainees are rated as outstanding, 75% are rated as execellent/good, 10% are rated as satisfactory, and 5% are... more
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Probability & Statistics Probability

01/28/15

Someone could help me to solve this problem - Probability Exercise! Thank you!
In an inspection of automobiles in Los Angeles, 60% of all automobiles had emissions that do not meet EPA regulations. For a random sample of 10 automobiles, compute the following probabilitiesA-... more
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Probability & Statistics

01/28/15

Someone could help me - Probability Exercise! Thank you!
Over a long period of time in a large multinational corporation, 10% of all sales trainees are rated as outstanding, 75% are rated as execellent/good, 10% are rated as satisfactory, and 5% are... more
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Probability & Statistics Odds

01/21/15

How do I calculate the probability that atleast one will be tails when two coins or more are tossed?
Lets say 0 Is Heads and 1 Is tails If I toss a coin, there is 50% chances it lands on either side.01With two coins it means I could either have eitherOption 1:0 00 0 0 11 01 11 1Or Option 2:0 00 11... more
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Probability & Statistics

12/18/14

probability
a number smaller than 25 is chosen at random. find the probability of choosing: a factor of 20, an even number or a 7, a number smaller than 15
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Probability & Statistics

12/16/14

What is the probability that the student's alarm clock will not work on the morning of an important final exam
the principle of redundancy is used when system reliability is improved through redundant or backup components. Assume that a student's alarm clock has a 13.4 daily failure rate. 
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Probability & Statistics High School Maths

12/16/14

Statistics - Probability
Sam and Tina both have intentions to a Christmas party. The probability that Sam will go is 0.2. The probability that Tina will go is 0.9 if Sam goes, and 0.3 is Sam does not go.a) What is the... more
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Probability & Statistics

12/06/14

Probability
If you roll 5 six-sided dice what is the probability of rolling only one 6? what is the probability of rolling one or more 6's?   I don't understand how to find the total amount of outcomes much... more
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Probability & Statistics

12/06/14

Thirty-one biased coins are flipped once. The coins are weighted so that the probability..
Thirty-one biased coins are flipped once. The coins are weighted so that the probability of a head with any coin is 0.4. What is the probability of getting at least 16 heads?
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Probability & Statistics

12/03/14

Trying to confront a company regarding defective rates for units.
I have tried to do this myself, but the math escapes me *sigh* I am a forum owner and a company is having serious defective issues. We know that their "claimed" defective rate is WAY off and we... more
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Probability & Statistics

12/01/14

If the odds against an event are 3 to 5, what is the probability of the event occurring?
It's probability
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Probability & Statistics

11/30/14

Assume that blood pressure reading are normally distrubuted withy
Assume that blood pressure reading are normally distrubuted with mean 120. A researcher wishes to select people for a study but wants to exclude the top and bottom 12 percent . What would be the... more
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Probability & Statistics

11/28/14

probability question
1000 tickets are sold for a charity lottery at $5 each. Three numbers are drawn at random to receive 1st 2nd and 3rd place prizes of $2000, $1000, and $500 respectively. what is the mean... more
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Probability & Statistics

11/21/14

An unprepared student randomly guesses the answers to all of the 20
An unprepared student randomly guesses the answers to all of the 20multiple choice questions in an exam. If each question has four possiblechoices, what is the probability that the student scores... more
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Probability & Statistics

11/21/14

A fair die is rolled 360 times.
A fair die is rolled 360 times.(a) What is the expected number (mean) of the number of times a 2 willbe rolled?(b) What is the standard deviation of the number of times a 2 will berolled?
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Probability & Statistics

11/12/14

Find the probability that Jacob’s rolls will result in his having exactly the same score as Rick.
25. Rick andJacobplayagameinwhicheach one rolls two six-sided dice [each die is numbered from one to six]. Rick’s score is the sum of his two rolls. Jacob’s score is three times the lowest number... more
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Probability & Statistics

11/12/14

He has a 6/10 chance of scoring a goal in a game. What are the chances that he won’t score in the game?
2. Cristiano Ronaldo has a 6/10 chance of scoring a goal in a game. He has a 2/10 chance of scoring two goals in a game, and 1/10 chance of scoring a hat trick. A) What are the chances that he... more
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Probability & Statistics

11/11/14

Find the probability of rolling at least 3 even numbers in 7 rolls of six sided die
I need help setting this problem up.
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Probability & Statistics Probability

11/09/14

probability question 13
the probability that a certain comet colliding with a planet is approximately 1.5 x 10^-7 every time their orbits intersect. What is the probability that during 600,000 orbit intersections, at... more
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Probability & Statistics Probability

11/09/14

Probability Question 6
The probability that a part produced by a certain factory's assembly line will be defective is .047. Find the probabilities that in a run of 45 items, the following results are... more
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