5,385 Answered Questions for the topic probability

Probability Math Statistics Help

09/01/21

pls help pls help probability
A math competition hosted by HOD has the following rules. Each team will be composed of four (4) people and each team will try to answer ten (10) math questions of the same difficulty. You are only... more
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Probability Math Math Statistics

09/01/21

Probability help help
Suppose a 50-sided die was tossed. Let B be the event that the number appearing on top of the die is divisible 5 and let C be the event that the number appearing on the top of the die has a... more
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Probability

09/01/21

Statistics and Probability
In a recent year, 8,090,845 male students and 1,841,009 female students were enrolled as undergraduates. Receiving aid were 64.3% of the male students and 69.9% of the female students. Of those... more
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Probability Math Statistics Help

09/01/21

Probability Question help help
Hannah is taking a 6-item examination. Let her score be denoted by the variable X. Each item is worth 5 points. The exam is graded under the right-minus-wrong rule, which means incorrect and blank... more
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Probability Math Statistics Statistics

09/01/21

Probability pls help : D
Hannah is taking a 6-item examination. Let her score be denoted by the variable X. Each item is worth 5 points. The exam is graded under the right-minus-wrong rule, which means incorrect and blank... more
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Probability Math Statistics

08/30/21

Probability of Rolling Two Dice

My friend and I are playing a game and the person that rolls the highest number on the dice wins the game. Both dice has 6 sides.Dice number 1 has the number 5 on two sides and the number 2 on four... more
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Probability

08/30/21

Stein–Chen identity for the Poisson
1-) Solve the following:a-) If X ∼ Pois(λ) and g is any function, show that :E [Xg(X)] = λ E [g(X + 1)] (This is called the Stein–Chen identity for the Poisson.) b-) Find the third moment E [X3 ]... more
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Probability Statistics Prob

08/30/21

Probability and statistics
A company is trialling a new COVID test. They find that the probability that the test is positive given that the patient does have COVID is 0.94, whereas the probability that the test is positive... more
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Probability

08/30/21

Probability Question

Each year the Yellow Pencil Company makes millions of #2 pencils. They come in boxes of 12. A recent quality check found that 0.1% of pencils they produce are faulty. It is assumed the production... more
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Probability Algebra 2

08/30/21

Algebra II Question
Two boxes contain balls of various colors. Box A contains 5 red balls and 2 green balls, and Box B contains 3 red balls and 4 green balls. One ball is randomly drawn from each box. What is the... more
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Probability Statistics

08/29/21

probability stats
Suppose that a pest control program is dealing with two types of rats, black and brown.It is found that the probability of a rat being brown, given that it is caught in a trap, is 0.85.It is... more
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Probability Statistics

08/28/21

statistics probability
Suppose that the tourism board decides to look over their data on international tourists in the USA to make some predictions for when tourism resumes.They find that the probability that an... more
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Probability

08/28/21

An engineering system problem
An engineering system consisting of n components is said to be a k-out-of-n system (k ≤ n) if the system functions if and only if at least k of the n components function. Suppose that all... more
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08/23/21

Sampling Distribution: Customers at the Madison Coûteux are polled on a routinely basis. The conglomerate's administration states that its customers, 75% of them, valued the food as very good.
Customers at the Madison Coûteux are polled on a routinely basis.The conglomerate's administration states that its customers, 75% of them, valued the food as very good.A consumer-based testing... more
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08/23/21

Sampling Distribution: There are 350 workers in a firm, with an average age of 37.6 years and an 8.3 years of standard deviation.
There are 350 workers in a firm that consists of the following:-An average age of 37.6 years-Standard deviation of 8.3 yearsWhat is the probability that a random sample of 45 employees would have... more
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08/23/21

Normal Distribution: Credit card balances, consisting of mean = $2870, standard deviation = $900.
Normal Distribution question: Credit card balances, consisting of:Mean = $2870, standard deviation = $900.25 credit card holders are chosen at random.What is the probability that the mean balance... more
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Probability Statistics

08/23/21

Areas under The normal Curve
The mean of 200 numbers is 52 with a standard deviation of 7, what is the probability of getting a number between 50and 72?Write your answer in four decimal places.
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08/22/21

Student T Distribution question: Explain how P (t2 < ‐2.92) = 0.05 ?
Is it because of P (t2 < -2.92) being the same as 1 - P (t2 > -2.92), or how?(The degrees of freedom is 2)
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Probability Math Statistics Help

08/22/21

Pistol Competition Probability pls help
A, B, C and D are to fight a four-cornered pistol competition. All know that A's chance of hitting his target is 0.3, C's is 0.5, B never misses, and D is 0.7. The order of shooting is... more
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08/22/21

Continuous Probability Distributions (Standard Normal Distribution) question: If the daily consumption of the average person follows a normal distribution that consists of the following..
If the daily consumption of the average person follows a normal distribution that consists of the following: 3.58 (mean), 1.04 litres (standard deviation)How many litres do 67.72 percent of... more
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Probability Math Statistics

08/21/21

probability pls help
A, B, C, D were given pistols for a competition. The participants will try to shoot their competitors. If the person is hit, that person will be out of the competition. The shooting will turn in... more
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Probability Math

08/21/21

Cornered Duel Probability pls help
A, B, C, D were given pistols for a competition. The participants will try to shoot their competitors. If the person is hit, that person will be out of the competition. The shooting will turn in... more
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08/19/21

Expected Value question: If E (Y) = 6, then E (6Y - 4) =
If E (Y) = 8, then E (6Y - 4) =
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08/19/21

Variance question: If V (Y) = 6, then V (2Y- 4) =
If V (Y) = 6, then V (2Y- 4) =
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08/16/21

Law of Variance question: If V (Y) = 12, then V (4Y - 8) :
If V (Y) = 12, then V (4Y - 8) ?
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