803 Answered Questions for the topic Probability & Statistics
Probability & Statistics Problem Solving Continuous Probability Distribution Probability Distribution
05/19/15
what proportion of a normal distribution is within one standard deviation of the mean
how do i figure out what proportion of a normal distribution is within one standard deviation of the mean
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Probability & Statistics Probability
05/17/15
What is the probability??? (read description) ANSWER ASAP
A bag has 1 red marble, 4 blue marbles, and 3 green marbles. Peter draws a marble randomly from the bag, replaces it, and then draws another marble randomly. What is the probability of drawing 2...
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Probability & Statistics
05/16/15
a biased die with faces numbered 1 to 6 is rolled once. the figures below give the probability
the figures below give the probability of obtaining each of the numbers on the die after a single roll. what is the probability of obtaining a 3 or 4.
1 2 3 4 ...
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05/14/15
help????????
This year, there are 26 students in Joe's class (it is a SMALL school). There are 20 boys, 8 students in Honors Math and 30% of the boys are in Honors Math. If one student is selected at random,...
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Probability & Statistics Algebra 2
05/14/15
help????????
The probabilities that Sam gets an A in Physics is 12%, Judy gets an A in Physics is 40% and Paul gets an A in Physics is 98%. What is the probability that all three get an A in Physics?
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05/14/15
help????????
You draw 3 cards from a standard deck of 52 playing cards. What is the probability that you get at least 2 face cards?
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05/03/15
Compute Pr(-1.54<Z<1.33)
Suppose that Z is standard normal random variable. Compute Pr(−1.54<Z<1.33).(If needed, round answers to 3 decimal places)
05/03/15
Compute Pr(Z<-1.54)
Suppose that Z is a standard normal random variable. Compute Pr(Z<−1.54).(If needed, round answers to 3 decimal places)
Probability & Statistics
04/30/15
In a driving experiment, 46 people ran over a traffic cone and 54 did not. What is the experimental probability of a person hitting a traffic cone?
In a driving experiment, 46 people ran over a traffic cone and 54 did not. It has to do with probability.
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Probability & Statistics
04/28/15
If 2% of skiers can injure themselves due to falls, What is the probability that exactly 3 out of 100 will injure themselves?
What is the probability no more than 5 out of 100 will get injured?
What is the probability More than 3 of the next 100 will injure themselves?
What is the probability that the first skier to be...
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Probability & Statistics
04/28/15
Henry had a batting average of .0341.what is the probability that his first hit will not occur until his 5th at bat?
Henry has a batting average of .341.
What is the probability that his first hit will not occur until his 5th at bat?
What is the probability that his forst hit will occur within his first 5 at...
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Probability & Statistics
04/20/15
In a random sample of 63 women at a company, the mean salary is 48,902 with a standard deviation of 5270. In a random sample of 50 men at the company, the mean
In a random sample of 63 women at a company, the mean salary is 48,902 with a standard deviation of 5270. In a random sample of 50 men at the company, the mean salary is 53,454 with a standard...
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04/20/15
How many different values are possible for the random variable Y?
involving drawing calculators from a box of working and broken calculators. Assume that the box contains 14 calculators: 12 that work and 2 that do not work. A sample of 3 calculators is selected...
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04/20/15
How many different values are possible for the random variable X
Assume that the machine yields the item selected 70 percent of the time, and returns nothing 30 percent of the time. Three individuals attempt to use the machine. Let X be defined as the number of...
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04/20/15
How many different values are possible for the random variable X?
involving the selection of two students from a committee of students. Assume that the committee is made up of 2 males and 5 females. Two are selected at random, and a random variable X is defined...
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04/20/15
What is the expected value of the coin selected (in cents)?
Assume that the drawer contains 12 coins: 3 quarters, 5 dimes, and 4 nickels. One coin is randomly selected.What is the expected value of the coin selected (in cents)?
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Probability & Statistics
04/20/15
Athletic Probability
Approximately 35% of the walk-on athletes at a given school actually make the team, according to the athletic department. Determine the probability that more than 50% of the 25 walk-on athletes...
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04/15/15
Explain "equally likely" in continuous uniform distribution using everyday items?
What is the best way to explain "equally likely" in continuous uniform distribution to an audience using tangible or everyday items?
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04/15/15
(1) What is the probability that she remembers to bring her briefcase every day in one week (5 days)?
about the professor who sometimes forgets to bring her briefcase to the office, but assume that, each day, the probability that she forgets the briefcase is 1/6. Assume that her forgetting is a...
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04/15/15
What is the probability that at least one mouse is female, given that exactly one is gray?
Assume that you have 10 mice in the cage: 4 white males, 3 gray females, and 3 gray males. Two mice are selected simultaneously and at random, and their colors are noted.What is the probability...
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04/15/15
Find Pr[A?B] under each of the following conditions:
events A and B of a sample space S, but assume that Pr[A] = 0.35 and Pr[B] = 0.5. Find Pr[A∪B] under each of the following conditions: (1) If A ⊂ B, then Pr[A∪B] = . (2) If A ∩ B = ∅, then Pr[A∪B]...
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04/15/15
What is the probability that both balls are red given that the first ball you drew was red?
Assume that each bag contains 5 balls. Bag a contains 3 red and 2 white, while bag b contains 1 red, 3 white, and 1 blue. You randomly select one ball from bag a, note the color, and place the ball...
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04/15/15
What is the probability that at least one inspector will find a defective widget?
Assume that the box contains 2 defective widgets and 10 acceptable widgets. There are 4 inspectors, each of whom selects a widget from the box at random, inspects it, and then replaces it in the...
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Probability & Statistics
04/13/15
19218 gas masks of the military were tested, 10322 ere defective. if 2 gas maskare selected, find the probability that they are both defective.
a.assume that the first gas mask is replaced before the next on is selected.
b.assume that the first mask is not replaced before he next one is selected.
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04/10/15
What is the probability that the student attends at least one class on Monday?
involving a student's attendance at math and accounting classes on Mondays. Assume that the student attends math class with probability 0.65, skips accounting class with probability 0.25, and...
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