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Probability
The probability of a certain event is a number expressing the likelihood that a specific event will occur, expressed as the ratio of the number of actual occurrences to the number of possible occurrences. In mathematics, it is a measure of how often an event will happen and is the basis of statistics.
14,643 Questions
What is the probability of rolling a product of 30 when rolling two dice?
There are only 2 outcomes in which this happens. Di 1 = 5, Di 2 = 6 or Di 1 = 6, Di 2 = 5.
This is 2 possibilities out of 36. 2/36 is 0.055556.
How do you combine probability to non probability sampling?
There are many methods: stratified random sampling and cluster sampling are two examples.
Suppose you have a school with 1000 pupil: 400 in the Junior school and 600 in the Senior school. You may wish to keep the sampling proportions in the two parts of the school the same. So if you wanted a sample of 5% = 50 pupils, you would take a probability or random sample of 5% = 20 from the Juniors and 5% = 30 from the Seniors.
For the second example, imagine you want to sample 5% of all schools in the country. This could result in you spending lots of time and money travelling from place to place. Instead, you divide up the country into 100 regions - each containing the same number of schools. You then take a probability sample of 5% of these regions. In each of the regions you visit every school.
What is the probability of an event that is affected by two or more different events called?
A dependent probability.
Theoretical probability = 0.5
Experimental probability = 20% more = 0.6
In 50 tosses, that would imply 30 heads.
What is the probability of not getting a club in a deck of 52 cards?
The probability of not getting a club is the same as the probability of getting one of the other suits. There are (52-13)=39 such possibilities out of 52. Hence the probability is 39/52=3/4.
What is the probability of drawing a 7 and a club from a deck of cards?
The answer depends on how many cards are drawn.
What exact percent falls the normal curve falls below at Z score of -2.00?
Although I cannot prove it, I doubt that there is a nice closed-form expression for this quantity; it's probably not a rational number.
It's value is approximately 0.0227501319482. (Using Python code.)
What is the probability of rolling a 3 on one numbered cube and a 4 on the other numbered cube?
1/6 x 1/6 = 1/36
What does same suit mean in cards?
A standard deck of playing cards consists of 4 suits: Spades, Hearts, Diamonds and Clubs. You can see them, in Word for example, by using 2660 Alt+X, 2665 Alt+X, 2666 Alt+X and 2663 Alt+X respectively. Cards sharing one of these symbols are said to be in the same suit.
What are two requirements for a discrete probability distribution?
Not sure about only two requirements. I would say all of the following:
- there is a finite (or countably infinite) number of mutually exclusive outcomes possible,
- the probability of each outcome is a number between 0 and 1,
- the sum of the probabilities over all possible outcomes is 1.
The Poisson distribution, for example, is countably infinite.
What is the total number of possible outcomes when rolling a pair of dice work checked?
There are 36 possible outcomes.
Counting Aces as a face card, the answer is 0.0241
If Aces are not considered face cards, then the answer is 0.0181
What is the probability of pulling the right card from a deck of cards?
If we assume that the use of the definite article in the question implies that there is only one such card, the answer is 1/52.
What is a major drawback of probability sampling?
There is always an element of random error and so an exact answer is not possible.
How many ways can the word immunology be arranged?
4: the two m and o can be swapped without affecting the spelling.
What is the probability of picking a jack or a black three in one pick from a deck of cards?
Well there are six possibilities, the four jacks and the two black threes. This gives us a fraction of 6/52 which is a percentage of 11.54%
21/36 = 7/12
1-365/[(365-6)*365^6] = 1 Is this O.K ?
What is the probability of drawing two aces from a deck of 52 cards?
The answer depends on how many cards are drawn, and whether they are drawn with or without replacement. If 1 card is drawn, the probability is 0, if 50 cards are drawn (without replacement), the probability is 1.
If only two cards are drawn, at random and without replacement, the probability is (4/52)*(3/51) = 12/2652 = 0.0045
What is the probability that three f2 seeds chosen at random will include at least one yellow seed?
One would need more facts about the situation to be able to answer this question.
If 10% of plain M&Ms are blue and you have a sample of 20 M&Ms only two of them will be blue. If you need to have 15 blue M&Ms, then your sample size should be 150 M&Ms because 15 is 10% of 150.
