# P-Value

- The level of marginal significance within a statistical hypothesis test, representing the probability of the occurrence of a given event. The p-value is used as an alternative to rejection points to provide the smallest level of significance at which the null hypothesis would be rejected. The smaller the p-value, the stronger the evidence is in favor of the alternative hypothesis.

P-values are calculated using p-value tables, or spreadsheet/statistical software.

Because different researchers use different levels of significance when examining a question, a reader may sometimes have difficulty comparing results from two different tests.

For example, if two studies of returns from two particular assets were done using two different significance levels, a reader could not compare the probability of returns for the two assets easily. For ease of comparison, researchers will often feature the p-value in the hypothesis test and allow the reader to interpret the statistical significance themselves. This is called a p-value approach to hypothesis testing.

*Investment dictionary.
Academic.
2012.*

### Look at other dictionaries:

**Value investing**— is an investment paradigm that derives from the ideas on investment and speculation that Ben Graham David Dodd began teaching at Columbia Business School in 1928 and subsequently developed in their 1934 text Security Analysis . Although value… … Wikipedia**value**— val·ue 1 / val yü/ n 1 a: a fair return or equivalent in goods, services, or money for something exchanged received good value for the price b: valuable consideration at consideration … Law dictionary**Value theory**— encompasses a range of approaches to understanding how, why and to what degree people should value things; whether the thing is a person, idea, object, or anything else. This investigation began in ancient philosophy, where it is called axiology… … Wikipedia**Value engineering**— is a systematic method to improve the value of goods and services by using an examination of function. Value, as defined, is the ratio of function to cost. Value can therefore be increased by either improving the function or reducing the cost. It … Wikipedia**Value added**— refers to the additional value of a commodity over the cost of commodities used to produce it from the previous stage of production. An example is the price of gasoline at the pump over the price of the oil in it. In national accounts used in… … Wikipedia**Value network analysis**— is a methodology for understanding, using, visualizing, optimizing internal and external value networks and complex economic ecosystems. The methods include visualizing sets of relationships from a dynamic whole systems perspective. Robust… … Wikipedia**Value of information**— (VoI) in decision analysis is the amount a decision maker would be willing to pay for information prior to making a decision. imilar termsVoI is sometimes distinguished into value of perfect information, also called value of clairvoyance (VoC),… … Wikipedia**Value Line**— Value Line, Inc.(NASDAQ|VALU), is a New York corporation founded in 1931 by Arnold Bernhard, best known for publishing the The Value Line Investment Survey , a stock analysis newsletter that s updated weekly and kept by subscribers in a large… … Wikipedia**Value capture**— refers to a type of innovative public financing in which increases in private land values generated by a new public investment are all or in part “captured” through a land related tax to pay for that investment or other public projects. Value… … Wikipedia**Value Measuring Methodology**— (or VMM) is a tool that helps planners balance both tangible and intangible values when making investment decisions, and monitor benefits.Formal methods to calculate the Return on Investment (or ROI) have been widely understood and used for a… … Wikipedia**Value Stream Mapping**— is a Lean technique used to analyse the flow of materials and information currently required to bring a product or service to a consumer. At Toyota, where the technique originated, it is known as Material and Information Flow Mapping [Learning to … Wikipedia