3,465 Answered Questions for the topic probability

Probability Statistics

11/21/20

Probability Question Normal Distribution
Given that X has a normal distribution with mean 10 and standard deviation 2,find: P(9 <=X <=12) If P(a <= X <= b) = 0.95, then find a and b.
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Probability Statistics

11/21/20

Mathematical Statistics
If X is a continuous random variable with density function f (x) that is an odd function and E(X) exists, show that E(X) = 0.
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Probability Statistics

11/21/20

Statistics please help

A particular professor has noticed that the number of people, P, who complain about his attitude is dependent on the number of cups of coffee, n, he drinks. From eight days of tracking he compiled... more
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Probability

11/20/20

Hello help me solve this
in a class of 100 students 30 are in mathematics moreover of the 40 females in the class 10 are in mathematics if a student is selected at random from the class what is the probability that the... more
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Probability

11/19/20

Suppose a jar contains 14 red marbles and 39 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.
Suppose a jar contains 14 red marbles and 39 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.
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11/18/20

What is the value of C so that the following function is a probability density function? f(x)=Cx^9.5 --> see description
f(x)=Cx9.5 if 0≤x≤2, 0 otherwise
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Probability Math Statistics

11/17/20

6. Find P (Z > -1.50)
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Probability Math Statistics

11/17/20

6. Three hundred viewers were asked if they were satisfied with TV coverage of a recent disaster
6. Three hundred viewers were asked if they were satisfied with TV coverage of a recent disaster. (15 points)     Female (F)  Male (M)  TOTAL  Satisfied (S)  80  55    Not... more
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Probability Math Statistics

11/17/20

7. According to a National Health Survey
7. According to a National Health Survey, American men’s heights are normally distributed with a mean given by μ=69.7 inches and a standard deviation given by σ=2.8 inches.    a). If a man is... more
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Probability Math Statistics

11/17/20

 The data below are the passing scores on an Algebra exam in one class. For this question, round all answers to the nearesttenth, as needed
 The data below are the passing scores on an Algebra exam in one class. For this question, round all answers to the nearesttenth, as... more
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Probability Math

11/17/20

Suppose the amount of a popular sport drink in bottles leaving the filling machine has a normal distribution with mean 101.5 milliliters (mL)
8. Suppose the amount of a popular sport drink in bottles leaving the filling machine has a normal distribution with mean 101.5 milliliters (mL) and standard deviation 1.6. If 36 bottles are... more
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Probability

11/15/20

Two cards are drawn from a standard deck without replacement. What is the probability that the first card is a club and the second card is red? (Round your answer to three decimal places.)
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Probability

11/15/20

A pair of dice is tossed. Find the probability that the sum on the 2 dice is 8, given that doubles are rolled. (Enter your probability as a fraction.)
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Probability

11/15/20

Compute the conditional probabilities P(A|B) and P(B|A). (Round your answers to three decimal places.) P(A) = 0.7, P(B) = 0.4, P(A and B) = 0.25

P(A/B) = P(B/A) =
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Probability

11/15/20

A bag contains 39 U.S. quarters and eleven Canadian quarters. If four quarters are randomly picked from the bag, what is the probability of getting at least one Canadian quarter?

Answer should be rounded to one decimal place.
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Probability

11/15/20

If a person draws five cards from a standard deck (without replacing them), what is the probability that at least one of the cards is a face card? (Round your answer to one decimal place.)
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Probability

11/15/20

Suppose you ask a friend to randomly choose an integer between 1 and 10, inclusive. What is the probability that the number will be more than 3 or odd? (Enter your probability as a fraction.)
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Probability

11/15/20

Does the compound event consist of two mutually exclusive events? Two dice are rolled. The sum of the dice is a 5 or a 6. Compute the probability of the compound event occurring.
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Probability

11/15/20

Evaluate the expression. C(8, 6) · C(7, 5) /C(9, 5)
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Probability

11/15/20

A professor gives his students 9 essay questions to prepare for an exam. Only 4 of the questions will actually appear on the exam. How many different exams are possible?

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Probability

11/15/20

Probability- Calculus
Find the probability that when two 8 sided dice are rolled, the sum of the numbers on the top faces is greater than 13.
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Probability Statistic

11/14/20

Find probability
The faculty of a small eastern university is considering adding grade point average within a student's major to each transcript. You have been asked to sample students to determine student... more
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Probability

11/14/20

Probabilty question nunber 4
A psychology class has 28 males and 52 females. If the professor selects names from the class list using random sampling.a. What is the probability that the first student selected will be a... more
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Probability

11/13/20

Probability of testing samples
For 4 and 5, use the following information: According to the Florida Department of Health, the positive rate for coronavirus tests on Wednesday was 7.75%. Suppose 435 people in... more
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Probability Statistics

11/12/20

Statistics and Probability
A box contains ten numbered balls – one ball with the number 1, two balls with the number 2, three balls with the number 3 and four balls with the number 4. You will randomly select two balls from... more
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