5,385 Answered Questions for the topic probability

10/08/21

Please helppp kindly
In a group of students, the probability that they get greater than 90% on their statistics test is 0.42, theprobability that they slept at least 8 hours the night before the test is 0.516, the... more
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10/08/21

Need to find help in solving probability question
. A professor gives only two types of exams and designs only two types of questions, “easy” and “hard”. You will get a hard exam with probability 0.80. The probability that the last question on the... more
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Probability

10/07/21

Suppose you have 6 green cards and 5 yellow cards. The cards are well shuffled. You randomly draw two cards with replacement.
G1 = The first card drawn is greenG2 = The second card drawn is greena. Calculate P(G1 and G2)b. Calculate P(at least one green)c. Calculate P(G2 | G1)
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Probability Math Statistics

10/06/21

Statistics and Probabilty
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal... more
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Probability Maths

10/06/21

Probability question
If on average 5,000 people in the world get bitten by spiders every year, then what is the probability that a person chosen at random may have been bitten by a spider last year?
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Probability Math Statistics

10/05/21

Probability and Statistics
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal... more
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Probability Statistics

10/05/21

PLEASE HELP ME WITH THIS QUESTION
It is known that 23% of people ride public transport without paying for it. We talk to 81 people who have been on public transport in the last month. What is the probability that the sample... more
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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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