Software development

Expected Value Definition and examples

If the last example were to be considered for a casino, the casino would use the expected value to set the cost for a player to play the game. With an expected value of $3.50 for the die game, setting a value to play below $3.50 would create a loss as the game operates over time. A casino patron who knows the expected value would determine whether or not to play the new game based on the cost to play.

An iterative four-step problem-solving process (plan-do-check-act) typically used in process improvement. The number of defects found by a test level, divided by the number found by that test level and any other means afterwards. A metric that shows progress toward a defined criterion, e.g., convergence of the total number of tests executed to the total number of tests planned for execution. Testing performed to expose defects in the interfaces and interactions between integrated components.

definition of expected result

The third column gives the expected values both in the form immediately given by the definition, as well as in the simplified form obtained by computation therefrom. The details of these computations, which are not always straightforward, can be found in the indicated references. Is finite, and this is equivalent to the absolute convergence conditions in the definitions above. As such, the present considerations do not define finite expected values in any cases not previously considered; they are only useful for infinite expectations. In the mid-nineteenth century, Pafnuty Chebyshev became the first person to think systematically in terms of the expectations of random variables. Once you have these two numbers, you can plug them into the ELR formula to calculate expected loss ratio for this investment.

The St. Petersburg Paradox Game.

Static analysis is usually carried out by means of a supporting tool. A program of activities designed to improve the performance and maturity of the organization’s processes, and the result of such a program. The capability of an organization with respect to the effectiveness and efficiency of its processes and work practices. The capability of the software product to avoid failure as a result of defects in the software. On large projects, the person who reports to the test manager and is responsible for project management of a particular test level or a particular set of testing activities.

definition of expected result

Expected value, in general, the value that is most likely the result of the next repeated trial of a statistical experiment. The probability of all possible outcomes is factored into the calculations for expected value in order to determine the expected outcome in a random trial of an experiment. Expected value uses all possible outcomes and their probabilities of occurring to find the weighted average of the data in the data set.

Example of Expected Value (Multiple Events)

For example, in decision theory, an agent making an optimal choice in the context of incomplete information is often assumed to maximize the expected value of their utility function. For a different example, in statistics, where one seeks estimates for unknown parameters based on available data, the estimate itself is a random variable. In such settings, a desirable criterion for a “good” estimator is that it is unbiased; that is, the expected value of the estimate is equal to the true value of the underlying parameter. The expected value of a random variable with a finite number of outcomes is a weighted average of all possible outcomes.

A capability maturity model structure wherein capability levels provide a recommended order for approaching process improvement within specified process areas. A software development procedure merging, integrating and testing all changes as soon as they are committed within an automated process. The computing-based processes, techniques, and tools to support testing. The degree to which a component or system can exchange information with other components or systems, and/or perform its required functions while sharing the same hardware or software environment. Excessive emotional or psychological dependence on another person, specifically in trying to change that person’s current behavior while supporting them in continuing that behavior.

definition of expected result

When making a decision that could have multiple outcomes, business should look at the value of each alternative and choose whatever alternative that has the highest value. First, itemize each possible outcome and assign it a probability of occurring (with all outcomes totaling 100%). Then multiply the probability of occurrence for each outcome by the dollar value of that outcome. Expected value is the sum of all possible outcomes multiplied by their likelihoods of occurrence.

Expected return formula

A collection of components organized to accomplish a specific function or set of functions. The analysis of source code carried out without execution of that software. Testing performed on completed, integrated software to provide evidence for compliance with software requirements. A cryptographic technique that adds random data to the user data prior to hashing. Typical features include review planning and tracking support, communication support, collaborative reviews and a repository for collecting and reporting of metrics.

Jenny is trying to determine which store front she should purchase to expand her retail chain. She did some research to determine how much profit definition of expected result she could earn at each store. Store A has a 60% chance of generating $200,000 in annual profit and a 40% chance of generating $250,000.

A decision table in which combinations of inputs that are impossible or lead to the same outputs are merged into one column , by setting the conditions that do not influence the outputs to don’t care. A black-box test technique in which test cases are designed using a classification tree. A review technique guided by a list of questions or required attributes.

Thesaurus Entries Near expected

The standard calculation for the mean is equivalent to using a weight of 1 for each number. Insurance companies use this to determine how much to charge you for your premiums. They add up everyone in your reference class, and determine how much it costs them on average in payouts. They then add a little on the top to make a profit, which makes buying insurance net negative on expectation, just like buying a lottery ticket. A lot of people don’t like taking on excessive risk , so buying insurance is rational. Another way to put this is that we have diminishing marginal returns to extra money .

The process of developing and prioritizing test procedures, creating test data and, optionally, preparing test harnesses and writing automated test scripts. The process of running a test on the component or system under test, producing actual result. The disproportionate growth of the number of test cases with growing size of the test basis, when using a certain test design technique. Test case explosion may also happen when applying the test design technique systematically for the first time. An environment containing hardware, instrumentation, simulators, software tools, and other support elements needed to conduct a test.

A type of testing in which business processes are tested from start to finish under production-like circumstances. A black-box test design technique in which test cases are designed to execute the combinations of inputs and/or stimuli shown in a decision table. A white-box test technique in which test cases are designed to execute definition-use pairs of variables. A content-based model for test process improvement built around twelve critical processes. These include highly visible processes, by which peers and management judge competence and mission-critical processes in which performance affects the company’s profits and reputation. A test case with concrete values for input data and expected results.

  • A standard that describes the characteristics of a design or a design description of data or program components.
  • A part of a series of web accessibility guidelines published by the Web Accessibility Initiative of the World Wide Web Consortium , the main international standards organization for the internet.
  • Method aiming to measure the size of the functionality of an information system.
  • A tool that provides support to the test management and control part of a test process.
  • A binomial random variable is a random variable representing the number of “successful” outcomes in a fixed number of trials of a random experiment with two results and a fixed probability of success.
  • A test case is beneficial in exhaustive testing — a software testing approach that involves testing every possible data combination.

A procedure to derive and/or select test cases based on an analysis of the specification, either functional or non-functional, of a component or system without reference to its internal structure. A collaborative approach to development in which the team is focusing on delivering expected behavior of a component or system for the customer, which forms the basis for testing. A review technique performed informally without a structured process. A collaborative approach to development in which the team and customers are using the customers own domain language to understand their requirements, which forms the basis for testing a component or system. In this article, we will also come across examples on how to use expected return. Where includes all of the possible outcomes of the random variable, and are the probabilities of each outcome.

Summary Definition

Testing to determine if the game music and sound effects will engage the user in the game and enhance the game play. Directed and focused attempt to evaluate a specific quality characteristic of a test object by attempting to force specific failures to occur. The value of shares and ETFs bought through a share dealing account can fall as well as rise, which could mean getting back less than you originally put in. CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. This is in addition to winning your $3 back, so a net win of $5 or $10.

So all the games that they offer have been mathematically and statistically scrutinized by the business team to make sure that the casino ends up making money. A test script is a line-by-line description of all the actions and data needed to properly perform a test. The script includes detailed explanations of the steps needed to achieve a specific goal within the program, as well as descriptions of the results that are expected for each step.

What Are Historical Returns?

The process of evaluating behavior, e.g., memory performance, CPU usage, of a system or component during execution. The phase within the IDEAL model where it is determined where one is, relative to where one wants to be. The diagnosing phase consists of the activities to characterize current and desired states and develop recommendations.

So, if the tech industry has an average P/E of 25x, a tech stock’s EV would be 25 times its earnings per share. Modern portfolio theory uses expected value in conjunction with an investment’s risk to come up with optimized portfolios. This means that the long-term average rate of return on this opportunity is 2.5 percent.

A sequence of transactions in a dialogue between an actor and a component or system with a tangible result, where an actor can be a user or anything that can exchange information with the system. A document specifying a sequence of actions for the execution of a usability test. It is used by the moderator to keep track of briefing and pre-session interview questions, usability test tasks, and post-session interview questions. A process through which information about the usability of a system is gathered in order to improve the system or to assess the merit or worth of a system . The amount of time required by a user to determine and execute the next action in a sequence of actions. A way of developing software where the test cases are developed, and often automated, before the software is developed to run those test cases.

A person who defines the way testing is structured for a given system, including topics such as test tools and test data management. A structured testing methodology, also used as a content-based model for improving the testing process. Systematic Test and Evaluation Process does not require that improvements occur in a specific order.

More meanings of expected

A well defined expectation implies that there is one number, or rather, one constant that defines the expected value. Thus follows that the expectation of this constant is just the original expected value. Similarly, the Cauchy distribution, as discussed above, has undefined expectation. An illustration of the convergence of sequence averages of rolls of a die to the expected value of 3.5 as the number of rolls grows.

A type of security attack performed by inserting malicious code at an interface into an application to exploit poor handling of untrusted data. The person involved in the review that identifies and describes anomalies in the product or project under review. Reviewers can be chosen to represent different viewpoints and roles in the review process. A black-box test design technique in which test cases are designed based on boundary values.

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