760 Answered Questions for the topic Probability & Statistics

Probability & Statistics

11/04/17

statement is true
Which of the following statements is TRUE?  A. If all of the data values in a data set are identical, then the standard deviation is 1. B. The variance is one of the measures indicating... more
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Probability & Statistics

11/03/17

Probability Curve
Scores on the SAT form a normal distribution with an average of 500 and a standard deviation of 100. Based on this information, what percent of scores fall above an SAT score of 520?
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Probability & Statistics

11/03/17

16. Fifteen people work in an office. 8 are women and 7 are men. The flu virus is coming. (a) In how many ways can the flu virus randomly select 9 workers out
hard time with this one
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Probability & Statistics

11/03/17

The mean reaction time of 1500 randomly selected students who took SHOVITALLTM anti- math anxiety medication was measured at 12 minutes, with a standard deviati
The mean reaction time of 1500 randomly selected students who took SHOVITALLTM anti- math anxiety medication was measured at 12 minutes, with a standard deviation of 2 minutes. Assuming a normal... more
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Probability & Statistics

11/03/17

9. Find the equation of the line passing through (3, 1) and (4, – 1): A. 5x–4y= 11 B. 2x+5y = 3 C. 2x+y = 7 D. 3x+4y = 8
need assistance with multiple ??
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Probability & Statistics Odds

11/01/17

There are 100 numbers listed. What are the odds that if 10 numbers are selected, that at least one is 20 or less?
It's a probability question that I can't seem to figure out.
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Probability & Statistics

10/29/17

find the random variable x has a poisson distribution with mean u=6, find the probability that x=2
find the random variable x has a poisson distribution with mean u=6, find the probability that x=2
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Probability & Statistics Elementary Statistics

10/27/17

Question in description
Question Help A candy company that makes colored candies claims that 10% of the candies it produces are green and that bags are packed randomly. In a really large bag of candies, we found 12% of... more
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Probability & Statistics

10/25/17

Probability and Stats
There are 49 even numbers from 1 to 99. The mean of 48 of these numbers is 49 and 5/12. Which even number was not included in the calculating of this mean?
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Probability & Statistics

10/25/17

Probability and Stats
Two different whole numbers are randomly selected from the set {1,2,3,...,9}. What is the probability that their product is an even number?
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Probability & Statistics Math

10/25/17

In a certain truckload of apples 30% of the apples are rotten. if 12 are chosen at random, what is the probability that less than 3 of them are rotten?
 I know how to do conditionals somewhat but this confuses me because i dont know the amount of apples.
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Probability & Statistics

10/23/17

find the probability of getting exactly 4 heads on 8 flips of a coin
I do not know how to figure this out
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Probability & Statistics

10/22/17

A survey claims that the % of customers who favor Cheerios cereal over Fruit Loops cereal is likely between 78.01% and 45.99%. How many people were surveyed?
Choices: 1)62 2)10 3) 39 4) 32
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Probability & Statistics

10/20/17

Two six-sided dice are rolled. What is the probability that one of the dice shows a 5 or the dice sum to 3?
 Two six-sided dice are rolled. What is the probability that one of the dice shows a 5 or the dice sum to 3?
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Probability & Statistics

10/18/17

A brand name has a 40​% recognition rate. The probability that exactly 4 of the 5 consumers recognize the brand name
A brand name has a 40% recognition rate. Assume the owner of the brand wants to verify that rate by beginning with a small sample of 5 randomly selected consumers. Complete parts (a) through (d)... more
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Probability & Statistics

10/17/17

Find the probability that an accident involves at least one car.
Probabilities of different types of vehicle-to-vehicle accidents are shown below:   Accident Probability   Car to Car 0.65 Car to Truck 0.17 Truck to Truck 0.18
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Probability & Statistics

10/17/17

suppose a jar contains 377 red marbles and 332 blue marbles. If you reach in the jar and pull out 2 marbles at random, find the probability that both are red.
how marbles in the 
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Probability & Statistics

10/16/17

Deck of Cards Probability Question
There are two decks of cards. Each deck has a red, a yellow, a blue, and a green card in it. If a card is drawn, from the first deck, and then a second card drawn from the second deck, what is the... more
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Probability & Statistics

10/15/17

A wheel has 1 red, 2 blue, 3 yellow, 4, green, and 5 purple spaces of equal area. What is the probability of spinning yellow and then spinning another yellow?
Would the answer be 0.2? Please help.
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Probability & Statistics

10/13/17

Raffles have 100 tickets for sale, and I buy 80, so probability winning is 80%. What is probability for win one of two raffles-obviously more than 80%, but how
probability of winning raffle 
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Probability & Statistics

10/09/17

Please anwer the below.
If it snows on game day there is a 32% chance the Jets will win. If it does not snow on game day there is a 41% chance the jets will win. There is a 29% chance that it will snow on game day. a.... more
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Probability & Statistics

10/06/17

What is the probability of selecting a jury of two students and five ​faculty?
The grade appeal process at a university requires that a jury be structured by selecting seven individuals randomly from a pool of eleven students and seven faculty. (a) What is the probability of... more
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Probability & Statistics

10/05/17

I don't know how to do the question
The mean lifetime of a certain type of lightbulb produced by a manufacturing company is 200 months with a standard deviation of 30 months. Such a lightbulb will be guaranteed for 150 months by the... more
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Probability & Statistics Playing Cards

10/03/17

One card is selected from a standard deck of 52 playing cards. What is the probability that the card is either a spade or a four?
For the Praxis Core exam
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Probability & Statistics Math Probability Math Question

10/02/17

Forged Signaute or not Probability
A document is signed with an ElGamal signature. The probability that a signature is forged is (.1). Find the probability that at least one of the three Rob’s signatures is forged.
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