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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
How do you find the z score of 12.5?
To find the Z score from the random variable you need the mean and variance of the rv.
To find the Z score from the random variable you need the mean and variance of the rv.
To find the Z score from the random variable you need the mean and variance of the rv.
To find the Z score from the random variable you need the mean and variance of the rv.
What are the differences between sampling error and sampling bias?
Sampling bias is a known or unknown selection of data to be examined in an audit.
There should be no bias if the sample is random.
Ex ... look at the first item in the file folder. or examine all files for purchases over $10,000, or examine no files for sales less than $500.
Sampling error, is the incorrect selection of files for an audit.
Ex ... a random number generator tells you to audit file 1547, but you select 1457.
Sampling error is also used to describe the fact that auditing a sample will NOT create the exact same answer as auditing every single file or transaction.
Historical events which have occurred have a probability of 1. They are a certainty. This refers to the event itself, not some historian's or politician's interpretation of what happened. However, the probability that they will occur again depends on the event. Exact recurrence is impossible (probability = 0).
Which sampling method is based on probability?
There are many such methods: cluster sampling, stratified random sampling, simple random sampling.Their usefulness depends on the circumstances.
What is the probability of rolling two dice and the sum is greater than 5?
The probability is 26/36 or 13/18
What is sampling distribution of the mean?
Thanks to the Central Limit Theorem, the sampling distribution of the mean is Gaussian (normal) whose mean is the population mean and whose standard deviation is the sample standard error.
What is the ratio of favorable outcomes to total outcomes?
The probability of the event that comprises the favourable outcome.
How many outcomes are there when you flip a coin and roll a die?
12..... h+1, h+2, h+3, h+4, h+5, h+6, t+1, t+2, t+3, t+4, t+5, t+6,
What is the theoretical probability of rolling sum of 7?
-- There are (6 x 6) = 36 possible rolls for a fair pair of 6-sided dice.
-- There are 6 ways to roll a sum of 7 :
- 1 ... 6
- 2 ... 5
- 3 ... 4
- 4 ... 3
- 5 ... 2
- 6 ... 1
-- So the probability is 6/36 = 1/6 = 162/3 % .
-- The probability is the probability, not the 'theoretical' probability.
What is the theoretical probability of rolling a even number on a die?
There are 6 sides to a di. Each side has an equal number of odd or even numbers. The chances are 50/50 that you could roll an even number with one di. Using two, the mathematical possibilities are unknown to me. But I would say it would change the odds by hundreds.
Spade: 1 in 4
Ace: 1 in 13
What is the probability you'll get a king express as fractions?
The answer will depend on
- the deck of cards that you draw from: a pinochle deck, a deck with jokers, etc;
- how many cards are drawn,
- if more than one card is drawn, whether or not a drawn card is replaced before the next one is drawn.
What is the probability that type 1 error will be made z -2.575 or z 2.575?
The probability is 0.005012, approx.
What is the probability that the spinner stop in multiple of 3. The spinner is numbered 1 through 8?
Total number of possible stops = 8
Number of successful stops = 2 (stops on 3 or on 6 are successful)
Probability = 2/8 = 25%
What z-score value separates the highest 40 percent of the scores from the rest of the distribution?
0.2533
How many ways can you arrange 5 objects in straight line?
That would be 5x4x3x2x1 or 5! or 120 ways to arrange those objects in a line.
There are 2*4*6 = 48 possible outcomes in total.
How many ways can you arrange 4 different cubes?
The cubes can be arranged in a line in 24 orders, and each cube can be arranged in 24 orientations so the answer is 24*24 = 576 ways.
Of course, the question does not require then to be in a line so there are really infinitely many ways: for example one cube in your house, one in your garden, one in my house and one in my garden. Move one of them a bit and that's a different arrangement.
What is the probability of getting a six when you roll a dice?
The answer depends on how often you roll it! For one roll it is 1/6 but the probability increases to a near certainty as you increase the number of rolls.
What is the mean of a normal distribution?
It is the expected value of the distribution. It also happens to be the mode and median.
It is the expected value of the distribution. It also happens to be the mode and median.
It is the expected value of the distribution. It also happens to be the mode and median.
It is the expected value of the distribution. It also happens to be the mode and median.
