Probability

You are testing the difference between two means of independent sample and the population variance are not known. from those population you take two samples of two different size n1and n2. what degrees of freedom is appropriate to consider in this case

.237 or about 24 %

31% chance

The simple answer is that it is 1/7. The true answer is somewhat different because births are not uniformly spread across the days of the week. In some countries medical staff prefer to spend their weekends off and so there are fewer births at weekends. Then, there are other minor adjustments for the number of leap years between birth and the thirteenth birthday.

probability theory

They are statistical measures. For a set of observations of some random variable the mean is a measure of central tendency: a kind of measure which tells you around what value the observations are. The standard deviation is a measure of the spread around the mean.

b- Wuppertal

There is insufficient information on the shape of the spinner.

If you keep rolling the die, then the probability of rolling a 6 and then a 1 on consecutive rolls is 1.The probability is 1/36 for the first two throws.

Proportion is the probability of a selected sample. probability is the true probability of all cases. If this is not what you are looking for then please specify.

The probability cannot be 625 since, by definition, it must be a number in the range [0, 1].

Three sixteenths, or 19%.

The probability is 11/36. There are 36 possible outcomes, but 25 of these don't involve a 2 on either die.

The way to answer this is to ask what is the probability of not rolling a 2 on either die and subtract this from one.

The probability of not rolling a 2 with the first die is 5/6. It is of course also 5/6 chance of not rolling a 2 with the second die. So we multiply the probabilities and subtract from 1.

1 - (5/6 * 5/6) = 1 - (25/36) = 11/36.

Most schools require a 4 year college degree and a teaching certificate.

Dependent

The probability of drawing a red even card is 5 in 13 (assuming that the face cards are neither even nor odd). The probability of throwing a sum of 11 is 1 in 18. The probability, then, of doing both of these actions, since they are mutually independent, is simply their product, or (5 in 13) times (1 in 18) equals 5 in 234, or about 0.02137.

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.

6 in 36, or in simplest form 1 in 6.

For each number rolled on one die, there are only 6 possibilities for the other.

Yes, fraternal twins are perfectly normal.

if order of beads matters than you get 18P12= 8.892185702*1012. if order doesn't matter than it's 18C12= 18564 ways to arrange the beads.

If you are asking the chances of a web page not working then the chances are vanishingly small if the page is part of a well designed, well maintained web site run on a quality computer system and responsibly updated and monitored.

yes

probability.

eg.if i have 5 boxes and one of them has a chocolate,what is the probability that if i open a box,itt will have a chocolate.it's 1 in 5 or 0.2.

The probability of 2 coins both landing on heads or both landing on tails is 1/2 because there are 4 possible outcomes. Head, head. Head, tails. Tails, tails. Tails, heads. Tails, heads is different from heads, tails for reasons I am unsure of.

Empirical