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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 difference between continuous sampling and discrete sampling?

Continuous data is data that can theoretically be any amount at all. There may be a maximum and minimum value, but all numbers in between are possible. For instance, the amount of time it takes to complete a task, might be 13.4864 seconds. This makes the time continuous data.

Discrete is data that can only be set amounts. For instance, how much money someone has, or how many times they've been to the cinema. You cannot have 13.4864 cents, or have visited the cinema 7.33 times. This is a discrete value.

What is gained by converting a raw score to a Z score?

The Gaussian (Normal) distribution is determined by two parameters: its mean and its variance. Each combination of these two parameters results in a different probability density function (pdf). Finding the probability based on raw scores would require values of the pdf relating to that particular combination of mean and variance. The pdf for the Gaussian distribution is not simple to calculate and it would be impossible to tabulate infinitely many of them. Instead, only the pdf for the Z-scores - the Standard Normal pdf - is tabulated. Any raw score is converted to a Z-score and the probability evaluated from the tables.

What is the probability of getting 4 of a kind given 13 cards from a deck of card?

The probability is 1.

The probability is 1.

The probability is 1.

The probability is 1.

6 red socks 5 blue socks what is the probability of pulling out a red one?

oh shut up.... i havnt had maths today so find out yourself you lazy idiot

What is the function of synonvial fluid?

The function of synovial fluid is to reduce friction between the articular cartilage of synovial joints during movement. Synovial fluid has an egg yolk-like consistency.

If two dice are rolled what is the probability of rolling two different numbers?

15/21= 71.43% chance. It's the number of possible throws without repetition divided by the total different combinations of dice throw. Here is a handy Combination and Permutation Calculator: http://www.mathsisfun.com/combinatorics/combinations-permutations-calculator.html

What is an example of what ethnicity is?

Ethnicity is where your family originated for example, my family comes from Greece thus my ethnicity is Greek

Is the TV show 1000 Ways to Die true?

Mostly NO. They are done for entertainment, not educational purposes.

Practically all scenarios are exaggerated, sensationalized versions of *possible deaths* based on either true reports of *injuries* or on widely-circulated urban legends. Some are entirely fictitious, and some deaths shown could not reasonably occur in the manner shown.

Only ONE (the death of Harry Houdini) is a reasonably accurate portrayal of his accidental death.

What were the winning numbers in the Michigan Lottery on 11-18-09?

The winning numbers in the Michigan Classic Lotto 47 game were 8, 16, 23, 25, 32, and 35.

Donor center conducted a study over 1 year period and found that an average of 55 donors per day checked in to the center What is the probability that on any given day morethan 75 donor will check?

This describes a Poisson Probability Distribution; the mean mu is 55. The requested probability is for greater than 75. The related link has a Poisson applet which was used to obtain the probability; p(>75) = 0.00419.

Did charile daniles sing deck of card and in what year?

did charile daniles sing deck of cards and in what year

How do you find the probability of 2 dependent events?

That will depends entirely on how the two events are related. For instance, there may be a weak correlation, or a strong correlation, between two probabilities. You really need more information, about how the events are related. There is no single simple rule.

How to tell if unborn twins are fraternal or identical?

DNA testing...though to me, it makes more sense to wait until they're born before worrying about whether they're identical or not.

What are the different sports committees and his function?

This question has a variety of answers. This needs to be more specific. This also varies depending on the sport.

When three coins are tossed how many times out of 100 would you expect the result to be either three heads or three tails?

Each coin has 2 outcomes. Either being heads or tails. Take the outcome of each coin to the root of the number of coins.

(1/2)^3 = .125 = 12.5% or a 1 in 8 chance.

Take .125 and times it by 100 to get the probability out off 100 times.

.125 x 100 = .125 which = 12.5%= 1 in 8 chance

Are fractions and probability the same?

NO, but that is a great question since probability is often expressed as a fraction. Here is the difference. If P(x) is the probability that even x happens, this value must be between 0 and 1. So fractions such as 1/2 or 2/1112 are all fine. Many fractions, such as 4/3 cannot be a probability since they are greater than one. Similarly, -1/2 cannot be a probability value since it is less than 0/

What animal is colorblind?

Some animals are color blind... Just some can see some certain colors, like a horse can see blue's and greens, deer can see yellows and greens..etc...

Dogs most definitely are not color blind. There are some differences in their vision from that of humans, but -- contrary to popular myth, their eyes contain both rods (cells that detect light and movement but not color) and cones (which detect color and need more light than rods do in order to activate).

Rods are groups of light sensors connected to one neuron. Cones, on the other hand, are one neuron per cone and, unlike rods, have a narrow range of wavelengths they'll respond to. Dogs' cones respond to the human range of yellow, and blue-indigo.

Most breeds of dogs also do not resolve images well at distance, with a focal range of about 20/70 (to a human's vision of 20/20). This means, what you see at 75' is about what a dog sees at 20' (exceptions are Labrador Retrievers, who approach 20/20 -- which is why they're often used as guide dogs).

Dogs also have a wider angle of acceptance -- around 270 degrees (as opposed to a human's 180 degrees). This means they are more aware of events on the periphery of human sight of course, but as the acceptance angles of vision of the two eyes don't intersect as completely as humans, they don't get really good distance ranging except for a small angle of acceptance directly in front of them.

You can pretty easily test this if your dog likes retrieving. Get a bunch of identical balls in different colors, and watch for the surprisingly different reactions.

Birds are not color blind because you can teach a parrot to recognize colors. This is also true in a peacock's colorful wings.

Good point! While dogs have only two types of cones (see above about cones and rods) that detect yellow and blue-indigo, and humans have 3 (Cyan, Magenta, Green or Red/Yellow/Blue), birds have four, with the ability to see into the ultraviolet as well.

Pure white, Persian long-haired cats, are color blind.

One in four human males has a form of colorblindness, with differing levels of severity, or acuteness.

Deer are color blind. This is why hunters where blaze orange. It stands out for the hunters, but isn't noticeable for the hunted.