# Question: What Does This Mean Μ?

## What is the Sigma sign?

Sigma /ˈsɪɡmə/ (uppercase Σ, lowercase σ, lowercase in word-final position ς; Greek: σίγμα) is the eighteenth letter of the Greek alphabet.

In general mathematics, uppercase ∑ is used as an operator for summation..

## What is a C in statistics?

What is a C-Statistic? The concordance statistic is equal to the area under a ROC curve. The C-statistic (sometimes called the “concordance” statistic or C-index) is a measure of goodness of fit for binary outcomes in a logistic regression model.

## What does the backwards u mean in math?

In maths, the upside-down U means intersection of sets. … The ∩ symbol represents the intersection of two sets. This means the elements that are in common to both sets.

## What does the PSI symbol mean?

The symbol for psychology represents the penultimate letter of the Greek alphabet, psi, which is also the first letter of the Greek word psuche, meaning mind or soul, from which the term psyche arose; which in turn gave us the name of the discipline psychology which is most commonly defined as study of the mind.

## What is a backwards U in math?

What does the symbol ug (with the u ‘reversed’) stand for? … It stands for microgram as a part of the metric system. The “reverse u” is the Greek letter μ, which is the lowercase ‘m’. It is 1 millionth of a gram.

## What is the C with a tail called?

Cedilla: ç The little hook ¸ added under the letter c in French is a diacritical mark known as a cedilla, une cédille. The letter c with the hook ç is called c cédille. The sole purpose of the cedilla is to change a hard c, pronounced [k], to a soft c, pronounced [s].

## What is the upside down H symbol?

What you call “an upside down h” is a metric symbol for “micro” (see metric prefixes). It means 1/1,000,000. A “g” beside it stands for grams. All together is a unit that is 1/1000000 of a gram.

## What does μ mean in physics?

The lowercase Greek letter mu (µ) is used to represent the prefix multiplier 0.000001 (10 -6 or one millionth). In some texts, the symbol µ is an abbreviation of micrometer(s) or micron(s). These two terms both refer to a unit of displacement equal to 0.000001 meter or 0.001 millimeter.

## What is the U with a tail?

It is the Greek small letter mu: μ

## What does this symbol mean ψ?

The symbol for psychology represents the penultimate letter of the Greek alphabet, psi, which is also the first letter of the Greek word psuche, meaning mind or soul, from which the term psyche arose; which in turn gave us the name of the discipline psychology which is most commonly defined as study of the mind.

## What are the units for μ?

Table 5. SI prefixesFactorNameSymbol10-3millim10-6microµ10-9nanon10-12picop6 more rows

## What is the Greek symbol for mean?

Symbol. μ (statistics) population mean.

## What is the trident a symbol of?

The trident is associated with the sea-god Poseidon and his Roman counterpart Neptune. This divine instrument is said to have been forged by the cyclopes. Poseidon struck a rock with his trident, causing a sea (or a saltwater spring, called the Erechtheis) to appear nearby on the Acropolis in Athens.

## What is the triangle in Greek?

Delta /ˈdɛltə/ (uppercase Δ, lowercase δ or 𝛿; Greek: δέλτα délta, [ˈðelta]) is the fourth letter of the Greek alphabet. In the system of Greek numerals it has a value of 4. … A river delta (originally, the Nile River delta) is so named because its shape approximates the triangular uppercase letter delta.

## What does μ mean in math?

The symbol ‘μ’ represents the population mean. The symbol ‘Σ Xi’ represents the sum of all scores present in the population (say, in this case) X1 X2 X3 and so on. The symbol ‘N’ represents the total number of individuals or cases in the population.

## What is μ in math?

The lowercase Greek letter mu (µ) is used to represent the prefix multiplier 0.000001 (10 -6 or one millionth). For example, 0.000000001 farad or 10 -9 F of capacitance is commonly written as 0.001 µF.

## What is M in Greek?

The symbol for “micro” as a prefix to scientific units, since “m” was already used for “milli” and “M” for “Mega”, the greek m was used, as in mm for micrometers.

## How do you type μ?

1) Press the “Alt” key on your keyboard, and do not let go. 2) While keep press “Alt”, on your keyboard type the number “230”, which is the number of the letter or symbol “µ” in ASCII table.