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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
In one throw it is 1/3
What are the disadvantages of non probability sampling?
It is quite likely that the sample is not representative of the population and so while statistical conclusion may be valid for the sample, they may not apply to the population.
Why is important that a sample be random and representative when conducting hypothesis testing?
It helps you nawser
The odds that the first card would be black is 50:50 or 1 out of 2, since there are 26 black cards out of 52. Now with 51 cards left, there are only 25 black cards still available, so the odds that the second card would be black is 25 out of 51. Multiply 1/2 by 25/51 and you get 25/102 or a 24.5% chance that you select 2 black cards out of a deck.
If you toss a cube 20 times Could it land on six 20 times?
Yes but the probability for that is 1/3,656,158,440,062,976. In other words, it's probably not going to happen
What is the probability of face card if 2 cards are selected at random from a deck?
30.769 % chance that you will draw a face card out of a deck of cards.
29.63 % chance that you will draw a face card out of a deck of cards with the jokers in deck.
Which of these events in napoleons career occurred last in 1815?
Napoleons is defeated by Wellington at waterloo
Who used probablility and mathematics to predict offspring?
The first person known to have used probability and mathematics to predict offspring was Gregor Mendel. In the mid-1800s, Mendel studied the inheritance of seven characteristics in pea plants, in which each characteristic had only two forms, e.g., white or purple flowers, round or wrinkled seeds, and tall or short stems. Through these studies, he developed three laws of heredity; the law of segregation, the law of independent assortment, and the law of dominance. The chromosome theory of inheritance, developed in the early 1900s, explains the mechanism underlying the laws of Mendelian inheritance.
What is the signifance of the mean of a probability distribution?
It is the average of all the numbers in the distribution. If you chose a random data point of the distribution, there would be a 50% chance that it is above the mean, and a 50% chance that it is below the mean.
The first could be white, the second could also be white, but for the third there are no white left so the third would have to be black.
The first or second could be black, but to guarantee at least one black you need to remove 3 marbles.
How many ways can you arrange four books on a shelf using a diagram?
let a,b,c,d represent the 4 books
abcd, acbd, abdc, acdb, adbc, adcb, bacd, badc, bcad, bcda, bdac, bdca,
cabd, cadb, cbad, cbda, cdab, cdba, dabc, dacb, dbac, dbca, dcab, dcba
24 arrangements
answer can be found by multiplication
select 1st book -- 4 choices
2nd book -- 3 choices
3rd book -- 2 choices
4th book -- 1 choice
4x3x2x1 = 24
What is the probability of getting 2 numbers right in a lottery of 39 numbers?
The answer depends on how many numbers are selected.
The answer depends on how many numbers are selected.
The answer depends on how many numbers are selected.
The answer depends on how many numbers are selected.
What is the probilitly of rolling a single die to a even number or a number less than six?
Total possible outcomes of a single die = 6
Even numbers (2, 4, 6) = 3 possibilities.
Probability = 3/6 = 50% .
Numbers less than 6 (1, 2, 3, 4, 5) = 5 possibilities.
Probability = 5/6 = 831/3 % .
Standard deviation is the spread of the data. If each score has 7 added, this would not affect the spread of the data - it would be just as evenly spaced or clumped up, but 7 greater. The only thing that would affect the spread is multiplying every data point by 0.9. This makes distances between the data points 0.9 times as big, and thus makes the standard deviation 0.9 times as big. The standard deviation was 5.6, and so now is 5.6x0.9 = 5.04
What is probability of rolling a number divisible by 2 on a number cube?
Well, numbers divisible by 2 are even numbers, and the even numbers from 1 to 6 are 2,4,and 6. Since there are 3 out of 6 even numbers on a number cube, there is a probability 1/2 to roll an even number on a number cube.
What is an event with a probability greater then 0 but less than half?
There are many such events. The probability of throwing a 1 or 2 on one roll of a die, for example.
How often something happens divided by all outcomes is called?
The probability of whatever it was that happens.
What does sample mean in an entire population?
Political polls can't ask everybody in the Us their opinion, so they as a small group -- called a sample.
