760 Answered Questions for the topic Probability & Statistics

Probability & Statistics Discrete Mathematics

12/09/15

Probability of winning a laptop?
There is going to be a raffle in the College of Engineering and Computer Science. They are going to give away one prize. It willbe either a coffee mug, and old mouse, or a brand new Alienware... more
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Probability & Statistics

12/04/15

Probability question?
Assume that 2% of the Brazilian population have dengue fever in 2008 and that a test correctly identifies the fever 95% of the time. Assume that a false positive occurs 5% of the time. If a person... more
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Probability & Statistics

12/02/15

probability?
PLEASE help the probability that a person owns a cat is 89% and the probability of a person owning a sheep is 8%. the probability of someone owning both is 6%. what is the probability of someone... more
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Probability & Statistics

12/01/15

How many possible ways are there to form the executive board?
The board of directors of a corporation comprises twelve members. An executive board, formed by five directors, needs to be elected. How many possible ways are there to form the executive board?
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Probability & Statistics

12/01/15

What is the probability that a total of two dice thrown will be higher than a 4 given that the first dice is a 1?
 Remember to denote event A and event B, think about whether these will be dependent or independent? Use the corresponding formula in order to get to the answer.
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Probability & Statistics

12/01/15

Equipment A produces 12% and B produces 88% of spare parts.
From the past, the company knows that the probability of equipment A to produce a defective spare part is 0.03 and the probability for equipment B to produce a defective spare part is 0.07. If a... more
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Probability & Statistics Probability Story Problems Matrix

11/30/15

Probability and Markov Processes? Free Throws. Please Help.
If she made the last free throw, then her probability of making the next one is 0.9. On the other hand, If she missed the last free throw, then her probability of making the next one is 0.2. Assume... more
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Probability & Statistics Math Probability Ncr

11/29/15

The answer is 4/143 but I cannot figure out how to set my problem up to get to that answer. We are using nCr on the calculator to figure out our equation
A doctor has five doses of flu protection vaccine left. he has six women and eight men who want the medication. if the names of five of these people are selected at random determine the probability... more
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Probability & Statistics

11/28/15

Statistics
In a survey of adults 68% thought DNA tests for identifying an individual were very reliable. If you randomly select 44 adults and ask ear if he thinks the DNA tests for identifying an individual... more
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Probability & Statistics

11/25/15

Properly calculate an x times increase in probablity
Sample problem: Out of 100 events an outcome probablity is 0%. If the probability of this outcome increases by 21 times, what is the new probability %? Please share the calculation. Help is much... more
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Probability & Statistics

11/23/15

SB 7.35 fair method
35. Every year, the NBA holds a draft lottery. Teams who miss the playoffs in any given year are put into the lottery the next year. The team with the worst record gets 250 table tennis balls in... more
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Probability & Statistics

11/23/15

SB 7.31 probability
31. Find the probability of rolling a three first and then a four when a die is rolled twice.   a) 1/18 b) 1/6 c) 1/12 d) 1/36  
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Probability & Statistics

11/23/15

SB 7.19 normal distribution
19. Which of the following data sets could most likely be normally distributed?   a) Number of homeruns per baseball player in a championship seriesb) IQ test scoresc) Yearly income for... more
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Probability & Statistics

11/22/15

Standard Normal Distribution
separates the middle 95% of the data.
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Probability & Statistics

11/22/15

Finding the z-score for the middle 72% of the data
That separate the middle 72% of the data.
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Probability & Statistics

11/21/15

SB 7.15 accurate interpretation
15. Jimmy finds that the probability of rolling a die and getting a number that is three or less or is odd is 4/?=2/6≈67%. Which of the following is an accurate interpretation of this... more
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Probability & Statistics

11/21/15

SB 7.14 - probability
14. Find the probability of drawing a heart or a face card from a standard deck of cards.   a) 25/52 b) 6/26 c) 1/4 d) 11/26
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Probability & Statistics

11/21/15

SB 7.12 probability
12. Find the probability of rolling a prime number when a die is rolled.   a) 1/2 b) 1/3 c) 0 d) 1/6
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Probability & Statistics

11/21/15

SB 7.11 - probability
11. Shally decides to do an experiment to see how many times her MP3 player will shuffle through her songs and play her favorite group, “The Googly Girls” per hour. Her results are shown in the... more
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Probability & Statistics

11/19/15

SB 7.5 probability of marbles
5. Find the probability of selecting a green marble from a jar that contains 4 blue marbles, 3 red marbles, and 5 green marbles.   a. 1/3 b. 1/4 c. 5/12 d. 1/5
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Probability & Statistics

11/19/15

SB 7.4 probability w/o replacement
4. Find the probability of drawing an ace and a jack when two cards are drawn (without replacement) from a standard deck of cards.   a. 16/2607 b. 4/663 c. 1/221 d. 1/169  
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Probability & Statistics

11/19/15

SB 7.3 population standard deviation
3. What is the population standard deviation of the data set 6, 22, 18, 12, 15, 25?   a. 6.89 b. 16.5 c. 16.33 d. 6.29
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Probability & Statistics

11/19/15

SB 7.2 odds in favor
2. Find the odds in favor of rolling the same number on each of a pair of dice.   a. 1 to 6 b. 1 to 5 c. 2 to 5 d. 3 to 10
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Probability & Statistics

11/19/15

SB 7.1 - population mean
1. Weston asked 20 of his friends, ‘Are you going skiing this weekend?” Eight of the 20 said yes, they are going skiing. What would be the best estimate for the population mean?   a. 0.4 b.... more
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Probability & Statistics Math Probability Word Problem

11/18/15

markov chains
(i) If volume is high this week, then next week it will be high with a probability of 0.9 and low with a probability of 0.1. (ii) If volume is low this week then it will be high next week with a... more
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