5,341 Answered Questions for the topic probability

Probability Statistics

10/05/21

PLEASE HELP ME WITH THIS
According to a 2009 Reader's Digest article, people throw away about 13% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 194 grocery... more
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Probability Math

10/05/21

Plz Help Me Probability
A package of 30 wildflower seeds contains 15 black-eyed Susan seeds.What is the probability that a randomly selected seed will be a black-eyed Susan seed?Write your answer as a fraction or whole... more
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Probability Math Elementary Math

10/05/21

Venn Diagram Problem
A cellphone company has 1000 employees, 615 are male, 682 are single, and 505 are union members. 475 are single male and 87 are single and union members, 120 employees are single male and union... more
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Probability Statistics

10/05/21

Four marbles were drawn randomly from a box containing 5 red marbles, 4 blue marbles and 2 green marbles.

(a) How many ways can the four marbles be drawn from the box?(b) What is the probability of finding them all red?(c) What is the probability of finding them all blue?(d) What is the probability of... more
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Probability Math Algebra 1 Precalculus

10/03/21

What is the greatest common factor of the polynomial of 15x^4 Y^3+6x^3 Y^4+21x^2 Y^5
NEED IT ASAP
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Probability

10/02/21

Which probability distribution favors the most recent data?
I know that Gaussian (Normal) distribution has two parameters (mean and variance) which are updated with every new data point. But in the Normal distribution, the old data have a similar effect on... more
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10/01/21

Assume that a sample is used to estimate a population proportion .

Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a sample of size 101 with 48 successes. Enter your answer as an open-interval (i.e.,... more
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Probability Math Algebra 2 Calculus

10/01/21

Assume that a sample is used to estimate a population proportion .

Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a sample of size 107 with 58 successes. Enter your answer as a tri-linear inequality using... more
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10/01/21

Out of 300 people sampled, 264 had kids. Based on this, construct a 95% confidence interval for the true population proportion of people with kids.
Out of 300 people sampled, 264 had kids. Based on this, construct a 95% confidence interval for the true population proportion of people with kids.Give your answers as decimals, to three places
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Probability Math Algebra 2 Calculus

10/01/21

If n = 280 and ˆ p (p-hat) = 0.7, construct a 90% confidence interval.
Give your answers to three decimalsIf n = 280 and ˆp (p-hat) = 0.7, construct a 90% confidence interval.
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Probability Math Calculus Geometry

10/01/21

Out of 500 people sampled, 305 preferred Candidate A. Round to three decimals. Based on this estimate, what proportion (as a decimal) of the voting population ( p ) prefers Candidate A?
Out of 500 people sampled, 305 preferred Candidate A. Round to three decimals.Based on this estimate, what proportion (as a decimal) of the voting population (p) prefers Candidate A?Answer:Compute... more
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Probability

09/30/21

You have 7 pennies, 2, nickels, and 7 dimees. Without replacement, what is the probability of choosing 2 coins that total 10 cents.
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Probability

09/30/21

Probability distribution
10 people was randomly selected in a population. The prevalence of covid in the population is 1%. What is the probability that 1 person has covid and 9 people did not have covid?I am not sure if... more
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Probability

09/28/21

How many proper subsets are there of the set {H,I,J,K,L,M,N,O,P}
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Probability Math Elementary Math

09/28/21

Venn Diagram: Solve using Venn Diagram
A cellphone company has 1000 employees, 615 are male, 682 are single, and 345 are union members 285 are single male and 187 are single and union members, 120 employees are single male and union... more
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Probability Math Statistics

09/26/21

is this a sample or a population?
The data in the table below (and continued on the following page) show the 46 counties of South Carolina, and the number of cumulative COVID-19 cases reported by each county from the... more
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Probability

09/20/21

If the two spinners shown are each spun once, what is the probability that the sum of the two numbers is either even or a multiple of 3?
Spinner 1 has: (1, 2, 3, 4, 5, 6)Next spinner has: (1, 2, 3, 4, 5, 6, 7, 8)Been stuck on this problem for a long time. I know the answer but I have no idea how the textbook got there.
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Probability

09/19/21

Settling a debaate
There are three people sitting at a table. Person one decides to think of a number between 1-3. Person two will always get to choose first. Person three will choose second but has the chance of... more
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Probability Statistics

09/14/21

Refer to the sample data for a pre-employment drug screening shown below. If one of the subjects is randomly selected, find the following probabilities (rounded to 4 decimal places):
Refer to the sample data for a pre-employment drug screening shown below. If one of the subjects is randomly selected, find the following probabilities (rounded to 4 decimal places): Positive... more
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Probability Statistics

09/14/21

Call a household prosperous if its income exceeds $100,000.

Call a household prosperous if its income exceeds $100,000. Call the household educated if the householder completed college. Select an American household at random, and let AA be the event that... more
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Probability Statistics

09/14/21

Suppose that two machines 1 and 2 in a factory are operated independently of each other.

Suppose that two machines 1 and 2 in a factory are operated independently of each other. Let AA be the event that machine 1 will become inoperative during a given 8-hour period; let BB be the event... more
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Probability Statistics

09/14/21

One marble is to be selected from a box containing red, white, blue, yellow, and green marbles.
One marble is to be selected from a box containing red, white, blue, yellow, and green marbles. If the probability that the selected marble will be red is 2/7 and the probability that it will be... more
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Probability Statistics

09/14/21

Suppose a fair coin is tossed three times.
Suppose a fair coin is tossed three times.a) Using a tree diagram, list out all outcomes in the sample space. Let TT denote the coin lands on tails and HH denote the coin lands on heads.  b) Using... more
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Probability

09/14/21

A bag contain 10 white and 6 black balls, 4 balls are successively drawn out and not replaced. What are the probability of they are of alternately different colours
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Probability Statistics

09/09/21

probability statistics

A casino runs a game which consists of a sequence of coin tosses, if toss head, then gain +1 and the probability is 1/2. If toss the tail, then gain -1 and the probability is 1/2. A gambler starts... more
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