803 Answered Questions for the topic Probability & Statistics

Probability & Statistics Probability Probability Problems

10/07/15

An instructor gives his class a set of 13 problems with the information that the next quiz will consist of a random selection of 5 of them.
An instructor gives his class a set of 13 problems with the information that the next quiz will consist of a random selection of 5 of them. If a student has figured out how to do 11 of the... more
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Probability & Statistics

10/05/15

Probability
A city council consists of five Democrats and eight Republicans. If a committee of five people is selected, find the probability of selecting two Democrats and three Republicans.
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Probability & Statistics

10/05/15

Probability
Katrina, Kim, Sarah, Larry, Maria, Ian, Jim, and Sergio have all been invited to a dinner party. They arrive randomly and each person arrives at a different time. a. In how many ways can they... more
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10/05/15

Probability help!!
A biologist finds that 20% of fruit flies have short wings and 26% have eye defects. Assuming these two events are independent what is the probability that a randomly selected fruit fly has neither... more
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Probability & Statistics Statistics

10/01/15

Statistics question
A geologist collects hand specimen sized pieces of limestone from a particular area. A qualitative assessment of both texture and color is made with the following results. Is there evidence of... more
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Probability & Statistics Analysis

09/30/15

statistics help
The number of fatal car crashes per day in Houston is shown in the table below. Let X be the random variable representing the number of fatal crashes. Find P(X < 2). Hint: convert the table to a... more
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Probability & Statistics

09/30/15

I need confirmation?
A bag contains four marbles. One marble is blue, one is red, one is white, and one is yellow. Two marbles are draw from the bag by removing one marble and then, without replacing the first marble,... more
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Probability & Statistics

09/11/15

Compute probability of each of the following events: event a the sum is greater than 8 event b the sum is divisible by 5
An ordinary die is a cube with the numbers 1 through 6 on the sides. Imagine such a die is rolled twice in succession and that the face values of the two rolls are added togethe. The sum is... more
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Probability & Statistics

09/09/15

Let S = {a,b,c} be a sample space for an experiment. Suppose P{a}=1/2, P{b}=1/3, and P{c} = 1/6.
Let S = {a,b,c} be a sample space for an experiment. Suppose P{a}=1/2, P{b}=1/3, and P{c} = 1/6.list the events for the experiment. (Hint: you should find 8)Calculate the probabilities for each of... more
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Probability & Statistics

08/31/15

Probability question: Cards
Suppose that you select 2 cards without replacement from a standard deck of 52 playing cards.  If the first card that you select is a club, what is the probability that the second card that you... more
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Probability & Statistics

08/29/15

probability
A bag contains four marbles. One marble is blue, one is red, one is white, and one is yellow. Two marbles are draw from the bag by removing one marble and then, without replacing the first marble,... more
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Probability & Statistics Probability Problems

08/24/15

probability homework
 the probability that an exam coverage will be about chapter 1 is 0.45, the probability that it will cover chapter 2 is 0.63 and the probability that it will cover either chapter 1 and 2 or both is... more
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Probability & Statistics

08/19/15

A multiple-choice quiz has 10 questions. Each question has five possible answers.
Question Continued: Carman is certain that she knows the correct answer for Questions 1 and 4. If she guesses on the other questions, determine the probability that she passes the quiz.
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Probability & Statistics

08/19/15

Mr Adam and Mr Ouyang interviewed 75 students and found that 35 were in favor of changing date for Exam
a)If Mr Persaud selects 5 students and surveys them, what is the probability that more students are in favor of changing the date?   b)What is the expected number of students who want Exam date... more
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Probability & Statistics

08/19/15

A drawer contains four Kit Kat and five Aero candy bars. Two bars are drawn from the bag without replacement.
Create a probability distribution in which the random variable represents the number of Kit Kats.   Determine the expected number of Kit Kat if two chocolates are drawn from the bag without... more
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Probability & Statistics

08/18/15

If four decks of cards are shuffled together, what is the probability of dealing a 13-card hand you have exactly two black Queens?
a little confused with this question any help would be appreciated!
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Probability & Statistics Statistics Statistics Question True Or False

08/12/15

Trule/False Questions. Statistics
1: p-value is the probability of obtaining a sample result at least as extreme as that which was observed, assuming the null hypothesis is true. 2:An experiment is necessary to establish a... more
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Probability & Statistics

08/11/15

.276 is population proportion with a random sample of 400 Kentucky residents
Determine the probability of obtaining a sample proportion of Kentucky smokers that is more than .025 away from the population proportion (in other words, either greater than .301 or less than... more
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Probability & Statistics

08/08/15

80% of customers pay by credit card find the probability that (i)exactly two pay by credit card..(ii)less than three pay by credit card
to find probability
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Probability & Statistics

08/03/15

An unfair coin comes up heads 56.9% of the time. The coin is flipped a total of 27 times.
What is the probability that you get AT MOST 25 heads?   p=0.569 1-p = 0.431 n = 27
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Probability & Statistics

08/03/15

Probability question
An exam has 39 questions on it and students need to answer 26 of the questions.  In how many ways can this be done if the first 5 questions and exactly 6 of the last 8 questions must be answered... more
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Probability & Statistics Algebra 2 Statistics Probability

08/02/15

the teacher of a mathematics exam has written up a final exam but wants the questions to be random for each student.
There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully reading the scenario, determine the number of different final... more
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Probability & Statistics

07/21/15

probability
The percentage of the general population that has each blood type is shown in the following table.  Determine the probability distribution associated with these data.   Blood Type -     ... more
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Probability & Statistics

07/14/15

Find the expectation of the game.
If a player rolls two dice and gets a sum of 2 or 12, she wins $20. If the person gets a 7, she wins $5. The cost to play the game is $3. Find the expectation of the game.
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Probability & Statistics

07/06/15

A box contains 5 green hats and 4 blue hats and 3 hats are randomly selected from the box. Find the probability that at least one hat is blue.
These problems are usually easy, but I am totally blanking on this. I've tried a handful of ways and got it wrong.
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