| Developer: | 天一 邓 (10) | ||
| Price: | * Free | ||
| Rankings: | 0 | ||
| Reviews: | 0 Write a Review | ||
| Lists: | 0 + 0 | ||
| Points: | 0 + 3 (4.3) ¡ | ||
| Points +1 | |||
Description
Standard deviation may be abbreviated SD, and is most commonly represented in mathematical texts and equations by the lower case Greek letter sigma σ, for the population standard deviation, or the Latin letter s, for the sample standard deviation.
Application examples
The practical value of understanding the standard deviation of a set of values is in appreciating how much variation there is from the average (mean).
Experiment, industrial and hypothesis testing[
Standard deviation is often used to compare real-world data against a model to test the model. For example, in industrial applications the weight of products coming off a production line may need to comply with a legally required value. By weighing some fraction of the products an average weight can be found, which will always be slightly different from the long-term average. By using standard deviations, a minimum and maximum value can be calculated that the averaged weight will be within some very high percentage of the time (99.9% or more). If it falls outside the range then the production process may need to be corrected. Statistical tests such as these are particularly important when the testing is relatively expensive. For example, if the product needs to be opened and drained and weighed, or if the product was otherwise used up by the test.
In experimental science, a theoretical model of reality is used. Particle physics conventionally uses a standard of "5 sigma" for the declaration of a discovery. A five-sigma level translates to one chance in 3.5 million that a random fluctuation would yield the result. This level of certainty was required in order to assert that a particle consistent with the Higgs boson had been discovered in two independent experiments at CERN,also leading to the declaration of the first observation of gravitational waves, and confirmation of global warming.
Weather
As a simple example, consider the average daily maximum temperatures for two cities, one inland and one on the coast. It is helpful to understand that the range of daily maximum temperatures for cities near the coast is smaller than for cities inland. Thus, while these two cities may each have the same average maximum temperature, the standard deviation of the daily maximum temperature for the coastal city will be less than that of the inland city as, on any particular day, the actual maximum temperature is more likely to be farther from the average maximum temperature for the inland city than for the coastal one.
Finance
In finance, standard deviation is often used as a measure of the risk associated with price-fluctuations of a given asset (stocks, bonds, property, etc.), or the risk of a portfolio of assets (actively managed mutual funds, index mutual funds, or ETFs). Risk is an important factor in determining how to efficiently manage a portfolio of investments because it determines the variation in returns on the asset and/or portfolio and gives investors a mathematical basis for investment decisions (known as mean-variance optimization). The fundamental concept of risk is that as it increases, the expected return on an investment should increase as well, an increase known as the risk premium. In other words, investors should expect a higher return on an investment when that investment carries a higher level of risk or uncertainty. When evaluating investments, investors should estimate both the expected return and the uncertainty of future returns. Standard deviation provides a quantified estimate of the uncertainty of future returns.
Screenshots
Price
-
* In-App Purchases - Today: Free
- Minimum: Free
- Maximum: Free
Track prices
Developer
Points
Not found ☹️
Rankings
Not found ☹️
Lists
Not found ☹️
Reviews
Be the first to review 🌟
Additional Information
You may also like
-
- Standard Deviation Calc - SD
- iOS Apps: Utilities By: Phan Nhat Đang
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 5 (4.4) Version: 2.1.0 Use this app to compute the standard deviation from a set of numerical values. Specify whether the data is for an entire population or from a sample. Enter your population or sample ... ⥯
-
- Standard Fleet
- iOS Apps: Utilities By: Standard Fleet, Inc.
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 25 (4.8) Version: 1.8.4 Keep your connected fleet vehicles out of trouble with Standard Fleet. Standard Fleet is a Fleet Management platform designed for all connected vehicles no dongles needed. Proactively ... ⥯
-
- Calculate++
- iOS Apps: Utilities By: Pawel Wiszenko
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 0 Version: 3.0 Calculate++ is a simple, universal calculator made for both iPhone and iPad. KEY FEATURES * Choose your own color scheme. * Perform advanced math operations. * Use the app in either ... ⥯
-
- Calculate Alcohol by Volume
- iOS Apps: Utilities By: Bart Jacobs
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 7 (5.0) Version: 1.4 Calculate Alcohol by Volume (ABV) with only a few taps and track your brews or batches over time. This app is idea for home brewers of beer, wine, and cider! Whether you're a seasoned ... ⥯
-
- Calculate Italian fiscal code
- iOS Apps: Utilities By: Francesco Varotti
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 0 Version: 4.2.0 Calculate, decode, and save Italian fiscal codes quickly and easily. Enter your details (name, surname, date of birth, gender, place/country of birth) to generate your fiscal code, ... ⥯
-
- Standard Tags
- iOS Apps: Utilities By: Mike Nelson
- * Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 2 (5.0) Version: 1.4.2 Standard Tags is an app to allow easy viewing of tags & sheet music in the barbershoptags.com database. https://standardtags.com/privacy-policy https://standardtags.com/eula ⥯
-
- Calculate a Tip
- iOS Apps: Utilities By: Israel Manzo
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 0 Version: 1.2.1 Effortlessly calculate your bill with our intuitive app. Choose from a range of standard tip percentages using an accessible, user-friendly interface that simplifies the process. ⥯
-
- Calculate BMI&BFP
- iOS Apps: Utilities By: 忠 李
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 0 Version: 1.0 A tool for calculating BMI and BFR ⥯
-
- He&Po Calculate
- iOS Apps: Utilities By: Daniel Drake
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 0 Version: 1.0 In the field of engineering and science, accurate calculation of various physical parameters is essential for system design and performance evaluation. This He&Po Calculate APP focuses ⥯
-
- Convenient Geometric Calculate
- iOS Apps: Utilities By: PETTERS FAMILY FOUNDATION
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 2 (5.0) Version: 1.0 Convenient Geometric Calculations is a formula app that can be used to calculate unknown quantities from known data, including area and volume. ⥯
-
- Hours Minutes Calculate
- iOS Apps: Utilities By: Burak Kara
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 0 Version: 1.0 Introducing MinutesCalculator, the ultimate time management app designed specifically for pilots. Simplify your flight planning and logbook entries with an intuitive interface that ... ⥯
-
- European Standard IQ Test
- iOS Apps: Utilities By: 惠娟 高
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 40 (4.4) Version: 2.0 What is an IQ? An Intelligence Quotient indicates a person's mental abilities relative to others of approximately the same age. Everyone has hundreds of specific mental abilities--some ⥯
-
- American Standard Home Service
- iOS Apps: Utilities By: Lixil Automated Business Systems LLC
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 7 (4.1) Version: 7.9 American Standard Home Services offers a sophisticated platform that seamlessly connects workorders with installers, streamlining the service process for enhanced efficiency and ... ⥯
-
- TV Lift Standard
- iOS Apps: Utilities By: TVLiftCabinet.Inc
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 7 (4.0) Version: 1.0.5 If you are looking for a TV lift cabinet that will elegantly and efficiently elevate and hide your television, look no further than TVLiftCabinet.com. No need for another remote simply ⥯