803 Answered Questions for the topic Probability & Statistics

Probability & Statistics Probability Stats Probability Problems

03/27/16

Probability Question
X has the following pdf   x       p(x) -----|-------  10  |0.40  15  |0.15  17  |0.20  21  |0.15  22  |0.10   a)What is the moment generating function for X b)Use your Moment Generating... more
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Probability & Statistics Probability Stats Probability Problems

03/27/16

Probability Question
According to an airline report roughly 1 piece of luggage out of every 200 that are checked are lost. Suppose that a frequently flying businesswoman will be checking 120 bags over the course of the... more
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Probability & Statistics Probability Math Help Math Word Problem

03/27/16

Conditional Probability & The Multiplication Rule
If the probability of winning a carnival game is 3/7 and you play the game two times, what is the probability that you will win both times or you will lose both times?
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Probability & Statistics Probability Math Help Conditional Probability

03/27/16

Conditional Probability Multiplication Rule Help
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... more
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Probability & Statistics Probability Stats Probability Problems

03/23/16

Probability Question
A company has 27 employes. A committee of 4 will be selected. The probability that exactly one woman is selected for the committee is two times the probability that no woman are selected. Calculate... more
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Probability & Statistics Probability Math Help Conditional Probability

03/23/16

Conditional Probability Multiplication Rule Help
Suppose three cards are drawn at random from a standard deck. What is the probability they are all face cards?
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Probability & Statistics Probability Math Help Conditional Probability

03/23/16

Conditional Probability & The Multiplication Rule Help!
A card is drawn at random from a deck. What's the probability that it is a jack given that it is a face card?
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Probability & Statistics

03/22/16

Vos savant math problem
Vos savant math problem, why would choosing to switch from door 1 to door 2 be better? In that specific scenario wouldnt it be 50/50 because of the host reveals a goat in door 3 then that means the... more
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Probability & Statistics Probability Probability Problems

03/21/16

Probability statistics and two tailed test
A tomato farmer with a very large farm of approximately 2200 acres had heard about a new type of rather expensive fertilizer which would supposedly significantly increase his production. The frugal... more
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Probability & Statistics Standard Deviation

03/20/16

standard deviation find the probability that more than 30%
A manufacturer produces a certain type of components that has a length of 2.1 cm. the distribution of this components is normal with mean 2.15 cm and sd 0.4cm. There are 50 pieces in a bag. Find... more
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Probability & Statistics Statistics Probability Math Help

03/20/16

Math Homework Help!! Permutations, Combinations,Counting Techniques
There are 10 puppies. 6 are male, 4 are female. If you pick 3 puppies at random, what is the probability they will all be the same gender?
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Probability & Statistics

03/16/16

.His class had 30 students.To save time,he asked 10 boys the brand of sneakers that they were wearing..This was NOT a random sample.STATE ONE REASON WHY
write in a coplete sentence  
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Probability & Statistics

03/14/16

What is the number of possible outcomes if three quarters are tossed and the total numbers of heads and tails are counted?
A) 2 B) 4 C) 6 D) 8
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Probability & Statistics

03/14/16

If the probability of rain on any given day is .2 what is the probability that it will rain 2 days in a week?
If the probability of rain on any given day is .2 what is the probability that it will rain 2 days in a week?
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Probability & Statistics

03/09/16

True or False
In the classical approach to finding probabilities, we place the number of successes over the total possible. To find the total possible, we use counting methods such as factorials, permutations,... more
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Probability & Statistics

03/07/16

Suppose you tossed a die six times. What is the probability of getting exactly three fours
Probability 
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Probability & Statistics Probability

03/04/16

probability question
Probability of stopping at first traffic light is 0.7 and the probability of stopping at 2nd traffic light is 0.4. what is the probability of stopping at a)both light b) none of the traffic light   more
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Probability & Statistics

03/03/16

Can anyone help me
Find p(a and b) if p(a) = 0.8 p(a|b)=0.3 and p(b|a) =0.1 
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Probability & Statistics

03/03/16

You roll two six sided dice. What is the probability that you will roll an even the first time and a 5 on the second roll?
 You roll two six sided dice.  What is the probability that you will roll an even the first time and a 5 on the second roll?
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Probability & Statistics

03/01/16

Figuring out which payment plan is the best and why
you have been paying a delivery service $6 per week to make regular deliveries to your house. One week, just to make things interesting, you offer the service a new payment plan. Each week, you... more
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Probability & Statistics

02/27/16

rolling a fair die and pays as follows.........
A game consists of rolling a fair die and pays off as follows: $30 for a 6, $25 for a 5, $10 for a 4, and no payoff otherwise. (a) Find the expected value for this game.  (b) What would be a fair... more
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Probability & Statistics

02/27/16

sweepstakes, your ODDS of winning are 1 to 99. Whats the PROBABILITY that you will win?
in a certain sweepstakes, your odds of winning are 1 to 99. What is the probability that you will win?
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Probability & Statistics Statistics Statistics Question

02/24/16

Statistics Question: Cholesterol levels are normally distributed with a mean of 170 and a SD of 30.
Find the probability a randomly selected individual has a cholesterol level greater than 225.    The answer is = 0.0336 But i am not sure how to find this answer. 
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Probability & Statistics Statistics Statistics Question

02/24/16

Statistics Question: (1) The weight of a sperm whale's brain is NORMALLY Distributed with a mean of 15.5
pounds and a standard deviation of 3.6 pounds. What is the probability that a randomly selected sperm whale has a brain that weighs between 10- 20 pounds?    (2) Same question but what is the... more
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Probability & Statistics Statistics

02/23/16

Statistics Question: The % of UCF students that have taken an online course is 40%
In a random survey of 10 UCF students, what is the probability that two or fewer have taken an online course?    The answer is = 0.167 I just am not sure how to get this answer. 
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