0
Most computers generate pseudo-random numbers - these are numbers which are created using a formula, but due to the way the formula works, the sequence of numbers generated appears random and is good enough for most applications. The random number generator can be seeded so that the same sequence of "random" numbers is generated every time.
Some systems improve on this by using unpredictable "real-world" events to create a more truly random sequence:
The Apple ][ computer when waiting for a key press from the user would keep incrementing the current "seed"; thus the seed was influenced by the random event of the user pressing a key but if a series of "random" numbers was then taken, they were strictly pseudo-random.
Linux has a pseudo-random number generator in a library function, but it also has in the kernel itself an "entropy pool" which is filled by environmental "noise" created by device drivers, etc. By accessing /dev/random a series of numbers is created from this pool; if the pool empties then the device will block until more "Noise" has been collected. /dev/urandom acts similarly, except that if the pool empties, then it falls back onto a pseudo-random sequence. As the entropy pool is limited in size, the random values being read should be used where security is important, eg in creating the key for an encryption, in small doses.
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoYes. Usually, so-called pseudo-random numbers are generated, since those are easier to generate; in this case, each of the "random" numbers is calculated from the previous ones (and the final result adjusted to the user's wishes). However, it's also possible for a computer to produce completely random numbers - for example, by magnifying random fluctuations in an electrical signal.
Add your answer:
Earn +20 pts
What is the sum of a list of numbers divided by the total number of numbers in the list called?
Mean
What is the list of cubic numbers?
The list of cubes for integers 1 to 40 are:18276412521634351272910001331172821972744337540964913583268598000926110648121671382415625175761968321952243892700029791327683593739304428754665650653548725931964000
What are the next 2 numbers in the following sequence 2 3 5 7 11?
This list of numbers is the list of prime numbers. Following 11, the next two numbers in the list are 13 and 17.
What is the number that falls in the middle of the list of numbers called?
The number that falls in the middle of a list of numbers is the median.
What numbers is divisible by 20304?
The list of numbers that are divisible by 20,304 is infinite.
Can Microsoft Excel randomize orders of items in a list?
Just use =RAND() to generate random numbers in your list. Then you can sort it with the random numbers. Comments on answer: Let's just say the list is in column C and has 12 entries. Your answer says to "just use =RAND() to generate random numbers in your list". OK, so where "in the list" would I put the =RAND() function command? And in which cells would that function display the "random numbers in my list" that you suggest? And then, how would I go about sorting "it" with the random numbers that somewhere have been generated? Sorry for being the devil's advocate, but I just want to get clear info on how to do the task you answered.
Use a random number table to get a list of six random numbers from 1 to 8615?
5482, 7919, 3120, 1521, 6985, and 1970.
Has this number been used 108722108854563?
If you generated this number using a random numers list or random numbers generator, then the best guess would be that your use of it is the first.
Why is a frame necessary to obtain a simple random sample?
because it is the list that is used for assigning numbers to individual in the population.
Programming Random numbers without repetition of numbers in java?
Since you (hopefully) can't predict random numbers in Java, we'll need to store the numbers that we've generated so far. A Set seem ideal for this, as it automatically handles keeping itself free of duplicates. The problem is that the order in which elements are removed from a set are not guaranteed to be in the same as the order in which they were added. I would suggest using a List of some sort: // returns a List of n random integers from 0 to max static List<Integer> getUniqueRandomInts(final int n, final int max) { // if n > max, this function would never return, so remove the possibility if (n > max) { return null; } // new list of values final List<Integer> list = new ArrayList<Integer>(); // seed our random generator with the current time final Random rnd = new Random(System.currentTimeMillis()); // keep trying to add numbers until we have the proper number while (list.size() < n) { int num = rnd.nextInt(max); if (!list.contains(num)) { list.add(num); } } return list; }
8 15 9 4 11 12?
You need to re-submit the question !... This is just a list of random numbers.
What is a random number table?
Random numbers (or random deviates) are numbers chosen totally by chance, but also conform to a certain distribution. The most common distribution is the uniform distribution. If I say that a number is chosen totally by chance between 1 and 100, and there is equal chance that every number between 1 and 100 can be chosen, then this is a uniformly distributed random number. If I list these generated numbers in a table, then this is a random number table. A program like Excel can easily generate uniform random numbers from 0 to 1, by entering +rand() into a column in the spreadsheet. To calculate a new table, press F9.
How would one define the word enumeration?
Enumeration is to give things numbers. It can refer to counting things, or placing them in a numbered list. In computer science, an enumeration, shortened to 'enum', is a list of strings or other objects that are placed in a list, allowing the computer to refer to them by number efficiently.
Where is a complete list of Tenten's weapons?
there is no list she has a lot of weapons there just random
What is the probability of picking 2 prime numbers chosen at random from a list of numbers 1 through 50 without replacement?
There are 15 primes through 50, so it would be: (15 * 14) / (50 * 49) = 3 / 35
Ideas for random things to do?
you can do so much like:make your own sandwich out of things you have in your house, play with your pets(if you have any), sing random songs, play your iPod(if you have one), draw, watch TV, play on the computer, make a fort, write a hit song(if you can), make a lemonade stand If you would like a list of random things to do go to http://www.randomrandomness.co.cc/randomthingstodo.php it has a top 100 list of random things to do. Hope that helps
How do you do average of a lot of numbers?
To find the average of a list of numbers, add the numbers and divide by the number of numbers in the list.
