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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 getting two prime numbers 1-10?
The probability of getting two prime numbers when two numbers are selected at random and without replacement, from 1 to 10 is 2/15.
Is continuous distribution normal distribution?
le standard normal distribution is a normal distribution who has mean 0 and variance 1
What are the chances of picking a king and a diamond from a deck of cards?
the probability of picking a king from a deck of cards is 4/52,which is 1/13 because there are 4 kings. Which are king of heart, king of diamond,king of club and king of spade. And the probability of picking a diamond is 13/52,which is 1/4.
How do you find the probability of a spinner?
You find out how many choices there are in a spinner and then you take what it wants you to find the probability of and tur it into a fraction
For example:
You have a spinner with 4 triangles in it....2 are red and 2 are green,What is the probability of landing on a green triangle
2 out of 4
If events A and B are statistically indepnedent, then the conditional probability of A, given that B has occurred is the same as the unconditional probability of A. In symbolic terms,
Prob(A|B) = Prob(A).
What is the probability of getting at least one head on three tosses of a coin?
In the experiment of tossing a fair coin 3 times, the sample space is made of the
following 8 equiprobable events: S = {HHH, THH, HTH, HHT, TTH, THT, HTT, TTT}.
The events that at least have one head are 7. So the probability of getting at least
one head on three tosses is: P(at least one H) = 7/8 = 0.875 = 87.5%
How many three of diamonds are in a deck of 52 cards?
Of the 52 cards, there are an equal number of each of the 4 suits (Clubs, Spades, Diamonds and Hearts) so there are 52/4 = 13 of each suit.
In each suit there is an A, 2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K = 13 cards
Out of the 13 Diamond cards, there is only one which is a 3.
So there is only one 3 of diamonds in a standard deck of 52
What happens to the standard error of the mean if the sample size is decreased?
The standard error increases.
What is the important similarity between the uniform and normal probability distribution?
They are both continuous, symmetric distribution functions.
A simple random sample or a probability sample.
The mean must be 0 and the variance must be 1.
If the process can be assumed to follow a Gaussian distribution then 99.7% of the outputs of the process will lie between those two limits. That may be of benefit in quality control if it is a production process.
What is the probability of landing on heads twice?
The probability of landing on heads each time a fair coin is flipped, is 1/2.
Assuming that the question was supposed to be:
"What is the probability of landing on heads twice in a row?"
To calculate compound probabilities like this, we first have to work out the probability of landing on heads each time, and then multiply these two probabilities to get a compound probability.
1/2 x 1/2 = 1/4
So the probability of landing on heads twice in a row = 1/4 (for a fair coin)
How do you find the sample size when given the standard deviation and the mean with a sample value?
You cannot from the information provided.
What is the probability of drawing a marble that is not white?
It depends on how many marbles of each colour you have....
What is the probability of flipping a coin 4 times and getting 4 heads?
You still still have a 1:2 chance of getting heads regardless of the times you flip.
How many possible outcomes if 3 coins is flipped once?
As a group, I count four.
3 heads
3 tails
2 heads, 1 tail
2 tails, 1 head
What is the probability that exactly 1 out of the 10 cases were resistant to ciprofloxacin?
It depends on the global, or population, resistance to ciprofloxin.
What is 33.3 percent of the word eel?
A single letter.
33.3% equals 1/3.
1/3 of the word 'eel' would be one letter.
