803 Answered Questions for the topic Probability & Statistics
Probability & Statistics
04/27/16
The mean age at which men in the United States marry for the first time follows the normal distribution with a mean of 24.1 years. The standard deviation of the
The mean age at which men in the United States marry for the first time follows the normal distribution with a mean of 24.1 years. The standard deviation of the distribution is 2.5 years. For a...
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04/24/16
If a marble is chosen at random, which of the conditional probabilities is larger, P(red|large) or P(large|red)? URGENT
A jar contains 11 large red marbles, 4 small red marbles, 8 large blue marbles, and 6 small blue marbles. If a marble is chosen at random, which of the conditional probabilities is larger,...
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04/21/16
Math probability
the probability that a student is in honors given that he or she is in mrs rollins class is 28/51. the probability that a student is not in ms rollins class given that he or she is not in honors is...
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04/20/16
Expected Value - buyer
You can buy a lottery ticket for $1000. The odds are as follows:
1 in 10 tickets will pay $500.
1 in 100 tickets will pay $1000.
1 in 1000 tickets will pay $200,000.
1 in 10,000 tickets will...
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04/20/16
Expected Value – seller
An insurance company sells a policy for $1000. Based on past data, an average of 1 in 100 policyholders will win a $20,000 claim on a policy, an average of 1 in 200 policyholders will win a $50,000...
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04/20/16
Probability calculations
Probability calculations – exactly one occurrence You are looking for a job. Eventually you get six interviews. In each case you are one of four final candidates for the respective job. Let us...
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04/20/16
Probability Question
The barton Company manufactures automobile charge indicator gauges. Under test conditions, these gauges are supposed to read 0 volts. However, some gauges read slightly more than 0 volts and some...
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Probability & Statistics Probability
04/18/16
help with question
Acme Airlines flies airplanes that seat 100 passengers. From experience, they have determined, on average, 84% of the passengers holding reservations for a particular flight actually show up for...
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04/18/16
Probability
In a b olt factory 30%, 50% and 20% of pro duction is done on machine s I, I I and I I Iresp ectively. It is known that 4%, 3% and 5% of the output of these resp ective machinesis defective.(a)...
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04/15/16
A game involves rolling a fair six-sided die. If the number facing upward on the die is a whole number multiple of three, the player wins an amount equal to the
A game involves rolling a fair six-sided die. If the number facing upward on the die is a whole number multiple of three, the player wins an amount equal to the number on the die times $20. If the...
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Probability & Statistics Maths
04/14/16
probability
A certain medical disease occurs in 5% of the population. A simple screening procedure is available and in 3 out of 10 cases where the patient has the disease it provides a positive result. If the...
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04/14/16
Venn diagrams
The company is conducting a survey to determine the spread of two strains of viruses (type A and type B) in a certain wing of a hospital. Out of 450 patients, 267 tested positive to virus A253...
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Probability & Statistics
04/13/16
A random sample of 420 new Ford trucks showed that 105 required repairs within the first warranty year.
What is the estimate for the probability that a new Ford truck will need repairs within the first warranty year?
Select one:
a. 105b. 0.75c. 315d. 0.25
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Probability & Statistics
04/13/16
In a club there are 10 women and 7 men.
In a club there are 10 women and 7 men. A committee of 6 women and 4 men is to be chosen. How many different possibilities are there?
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04/11/16
probability / statistics question?
say that you were taking a multiple choice test and the teacher says you only have 30 seconds left. however, you have 5 questions left that you haven't answered. you have no time to even look at...
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04/11/16
Probability Question
We have a CDF
{0 if y< 0
F(y) = {Y^4 if 0<= y <= 1
{ 1 if y>1
The Z transformation is:
Z = 3Y^2 + 2,2 ≤ z ≤ 5
My question is: I dont...
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Probability & Statistics
04/04/16
Probability & Statistics
1. A family has n > 0 children with probability αp^n, where α≤p/(1-p). (a) What is the probability that the family has no children? (b) If each child is equally likely to be a boy or a girl...
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Probability & Statistics Probability Problems
04/04/16
Twenty-five percent of Americans are college graduates. You survey a random sample of fifteen Americans.
What is the probability that: a. Exactly three of them are college graduates? b. Between two and five (inclusive) of them are college graduates? c. More than seven of them are college graduates?
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04/03/16
Normal Distribution: Statistics Question
Suppose birth weight is normally distributed with a mean of 7.5 pounds and a standard deviation of 1 pound. What is the probability that out of 5 randomly selected babies, exactly 4 of them are...
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Probability & Statistics
03/30/16
4 simple probability questions
1 . Approximately 72% of the students in this class make less than $20,000 a year. If 7 students are randomly selected, find the probability that more than 3 students make less than $20,000 a...
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Probability & Statistics Probability
03/28/16
help with this probability question.
A refrigerator contains 6 apples, 5 oranges, 10 bananas, 3 pears, 7 peaches, 11 plums, and 2 mangos. Imagine you stick your hand in this refrigerator and pull out a piece of fruit at random. What...
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Probability & Statistics Probability
03/28/16
help with a question
A jar contains 10 blue marbles, 5 red marbles, 4 green marbles, and 1 yellow marble. Two marbles are chosen (without replacement). (a) What is the probability that one will be green and the other...
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Probability & Statistics Probability Problems
03/28/16
did i solve this correctly?
You can flip a coin three times.
a) what is the probability of getting heads on only one of your flips?
b) what is the probability of getting heads on at least one flip?
So this is how i got...
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Probability & Statistics
03/28/16
This is my first time taking college statistics and I'm stuck and confused. Please explain step by step for me to understand.
A=event the card selected is the king of hearts
B=event the card selected is a king
C=event the card selected is a heart, and
D=event the card selected is a face card
outcomes for each four...
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03/28/16
Conditional Probability & The Multiplication Rule
68% of the citizens approve of a governor. Only 47% of the citizens approve of both the governor and the lieutenant governor. If a randomly selected citizen approves of the governor, what is the...
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