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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

When do you use a normal distribution?

When studying the sum (or average) of a large number of independent variables.

A large number is necessary for the Central Limit Theorem to kick in - unless the variables themselves were normally distributed.

Independence is critical. If they are not, normality may not be assumed.

What is the function of cappilaries?

It transports blood cells into different parts of the body.

In four successive tosses a fair coin lands heads up each time What is likely to happen when the coin is tossed a fifth time?

The odds of each coin toss are 50-50. The coin has no memory; there is no record of what the last four tosses are. EVERY toss is at 50-50 odds.

How many permutations are in the word arithmetic?

10! permutations of the word "Arithmetic" may be made.

How do you calculate average bed rate?

bedrate1 +bedrate2 ... + bedraten-1 + bedraten

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N.

N= the number of variables

What is the probability of getting a face card or a red card?

The probability of getting a face card or a red card in a standard deck of 52 cards is (26 + 12 - 3) in 52 or 35 in 52 or about 0.6731.

26 red cards, 12 face cards, and 3 red cards that are also face cards.

What is the probability of choosing a blue or green shirt if there's 6?

Do you mean six shirts? Well, it would depend on the number of colored shirts:

EXAMPLES:

If say two were red, one blue, three green; the probability would be 4/6.

If say there were no blues, four white, one green, one purple; it would be 1/6.

How do you find the probability of rolling two dice and getting a sum of 2 then rolling again and getting a sum of 6?

Count the number of ways they can come up with that value compared to the total number of possible outcomes.

There are 6 different ways a die can fall.

There are therefore 36 different ways two dice can fall.

Of those, only 1 has a sum of 2: 1 on the first die and 1 on the second die (or "11", for short).

So the odds of rolling a 2 are 1/36.

There are 5 different ways to get a 6: 15 24 33 42 51, so the odds of rolling a six are 5/36.

The odds of rolling a 2 then a six are 1/36 * 5/36, or 5/1296.

What is sampling distribution of a statistic called?

The parent probability distribution from which the statistic was calculated is referred to as f(x) and cumulative distribution function as F(x). The sampling distribution and cumulative distribution of a statistic is commonly referred to as g(y) and G(y) where Y is the random variable representing the statistic. There are numerous other notations.

What do the repeating dots in a math problem mean?

The repeating dots, (Example: 1.333...) mean that the number is infinitely

defined, in other words, the number never ends. We can also make the previous
_
example look like this: It will have the same meaning. 1 .3 (With A bar over the 3) = 1.333...

The bar will indicate which decimal values are infinite.

Also please note that the bar should be above the numbers that are repeating

do not "abuse" the bar, It has the potential to get the question wrong.

Hope I helped! ~WonX~

If you toss a dice once what is the probability that 1 will come out?

"A" is singular, "dice" is plural. One "dice" is a "die".

Tossing one six sided die means the odds of the number 1 displaying is 1 out of 6.

Tossing two six sided dice means the odds of the number 1 displaying is zero, as at a minimum it will be 1 and 1, or 2.

Where else can probability be used?

"where else" implies that you already have some situations in mind. But you have chosen not to share that information. It is impossible for us to be sure that situations that we suggest in which probability may be used are not already on your list.

What does sample space of a probability event mean?

It means the set of all possible outcomes for the event.