Search results
Results from the WOW.Com Content Network
The notable unsolved problems in statistics are generally of a different flavor; according to John Tukey, [1] "difficulties in identifying problems have delayed statistics far more than difficulties in solving problems." A list of "one or two open problems" (in fact 22 of them) was given by David Cox. [2]
It is ubiquitous in nature and statistics due to the central limit theorem: every variable that can be modelled as a sum of many small independent, identically distributed variables with finite mean and variance is approximately normal. The normal-exponential-gamma distribution; The normal-inverse Gaussian distribution
List of unsolved problems in statistics; Probability. Topic outline of probability; List of probability topics. Catalog of articles in probability theory;
Statistics rarely give a simple Yes/No type answer to the question under analysis. Interpretation often comes down to the level of statistical significance applied to the numbers and often refers to the probability of a value accurately rejecting the null hypothesis (sometimes referred to as the p-value ).
The problem for graphs is NP-complete if the edge lengths are assumed integers. The problem for points on the plane is NP-complete with the discretized Euclidean metric and rectilinear metric. The problem is known to be NP-hard with the (non-discretized) Euclidean metric. [3]: ND22, ND23
But even so, a system can have many common modes of failure. For example, consider the common modes of failure of a RAID1 where two disks are purchased from an online store and installed in a computer: The disks are likely to be from the same manufacturer and of the same model, therefore they share the same design flaws.
Sufficiency (statistics) – see Sufficient statistic; Sufficient dimension reduction; Sufficient statistic; Sum of normally distributed random variables; Sum of squares (disambiguation) – general disambiguation; Sum of squares (statistics) – see Partition of sums of squares; Summary statistic; Support curve; Support vector machine ...
Operations research (or operational research) is an interdisciplinary branch of applied mathematics and formal science that uses methods such as mathematical modeling, statistics, and algorithms to arrive at optimal or near optimal solutions to complex problems; Management science focuses on problems in the business world.