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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
Will the sampling distribution of the mean always be approximatelly normally distributed?
Yes, and more so for larger samples. (It follows from the Central Limit Theorem.)
Determine the probability of the sum of 8 in the single tossed in a pair of fair dice?
The probability of rolling a sum of 8 is approx a 14% chance.
There are 36 possibilities when rolling 2 die. There are 5 possibilities of rolling a sum of 8.
→ Probability = 5/36 = 5/36 x 100% ≈ 14%.
When two dice are rolled the probability of getting a sum greater than 8?
There are 36 permutations of rolling two dice. Of these, 9 of them result in a sum of 9 or greater, specifically 6-3, 6-4, 6-5, 6-6, 5-4, 5-6, 4-5, 4-6, and 3-6.
The probability, then, of rolling a sum greater than 8 on a pair of fair dice is 9 in 36, or 1 in 4, or 0.25.
How many different 7 letter words can be formed from the letters of the word college?
(!7)/(!2.!2)
=1260
What does the 30 percent tornado probability from the spc typically mean?
This qualifies as a high-risk outlook.
A 30 percent tornado probability typically means that the Storm Prediction Center anticipates a major tornado outbreak with the potential for multiple long-track and violent tornadoes.
How is the t distribution similar to the standard z distribution?
Z is the standard normal distribution. T is the standard normal distribution revised to reflect the results of sampling. This is the first step in targeted sales developed through distribution trends.
Who has performed better a standard deviation of 1 or standard deviations of 2 than the mean?
It depends on whether it is 1 SD or 2 SD above the mean or below the mean. It also depends on which is better. Sometimes being below the mean is good (time to complete a race) whereas sometimes higher than the mean is better (score in an exam).
How many permutations are possible of the word rainbow?
Since there are no duplicate letters in the word RAINBOW, the number of permutations of those letters is simply the number of permutations of 7 things taken 7 at a time, i.e. 7 factorial, which is 5040.
Probability of drawing above a nine in a deck of 52 playing cards?
If the Ace is considered a high card, then there is approx a 38% probability of drawing above a nine in a standard shuffled deck of 52 playing cards, assuming no cards have already been drawn.
Reason:
There are five cards above the nine in each suit (10, J, Q, K, A). So there is a five out of thirteen chance (or 20 out of 52); or 38.46%.
What is it called when evolution that occurs as a result of chance events like catastrophe?
genetic drift
The probability for most of the same colours is most likely green. One of each can be one of each, but there is a small chance you will get more red and yellow than green.
Do you mean the possibility of having in your opening hand:
a card you only have one copy of, in a 60 card deck, or;
a card that you have multiples of, in a 60 card deck. (If so what are the multiple values?)
Your percentage possibility of drawing one specific card, from a deck of 60 cards, in your opening hand of 7 is: 11.67%
A:
This can be worked out easily in excel using the hypergeometric distribution function.
for the possibility of having a card in the opening hand, when the deck on has one copy is as follows.card in hand1opening hand7copies of card1cards in library600.116667
in the cell that contains the result is the formula =HYPGEOMDIST(B1,B2,B3,B4)
Whereas the possibility of having a card in the opening hand, when the deck has four copies is:card in hand1opening hand7copies of card4cards in library600.33628
0.25 * 0.25 = 0.0625
in a deck of 52 cards there are two and four each of the number cards one over ten the probability of picking a joker is two out of 52 our two 52 write as a fraction the probability of drawin a 7
Why is there 1 in 2 probability that a tossed coin will land on heads?
because there are only 2 sides. It can land on one of those 2 sides.
Given an ordinary deck of cards what is the probability that a single card drawn would be an ace?
The answer is 1:13
There are 2*5! = 240 ways.
The probability of getting tails on a coin is SMALLER than rolling a number greater than 2
It is the probability of an event which is certain to happen.
What is the probability a club and king or red ace?
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What is the difference between stratified an random sampling?
In (Simple) random sampling, all of the units in the sample have the same chance of being included in the sample. Units are selected randomly from a population by some random method that gives equal probability to each element.
In stratified random sampling, the entire population is divided into heterogeneous sub-popuation known as strata (sub-population with unequal variances) and a random sample is chosen from each of these stratum.
The reason when to use which depends on the situation and need of the experimenter.
Probability is a ratio written as the number of desired outcomes divided by the number of possible outcomes.
On a six-sided number cube, there are 5 chances of getting a number greater than or equal to 2 (2,3,4,5,6) and 6 possible outcomes (1,2,3,4,5,6) so your probability would be 5/6.
