Acceleration

Acceleration is defined as the rate of change of velocity. The units of measurements for acceleration can be implied from the definition to be meters/second divided by seconds, usually written \(m/s^2\). Acceleration is inherently a vector quantity, and an object will have non-zero acceleration if its speed and/or direction is changing. Average acceleration The average acceleration is given by: … Leggi tuttoAcceleration

Fraction

A fraction is a real number written as a quotient, or ratio, of two integers \(a\) and \(b\), where \(b\neq 0\). \[\dfrac{a}{b}\] The integer above the fraction bar \(a\) is called the numerator and the integer below \(b\) is called the denominator. The numerator is often called the “part” and the denominator is often called the “whole”. Equivalent fractions are two equal ratios expressed … Leggi tuttoFraction

Decimals

A decimal numeral, or just decimal, or, improperly decimal number, refers generally to the notation of a number in the decimal system, which contains a decimal separator: for example 3.14; the decimal separator is the dot “.” in many countries, but may be a comma “,” in other countries (mainly in Europe). The numbers that may be represented in the decimal system … Leggi tuttoDecimals

Chi-squared test

The chi-squared test, also written as \(\chi^2\) test, is used to determine whether there is a significant difference between the expected frequencies and the observed frequencies in one or more categories.Without other qualification, ‘chi-squared test’ often is used as short for Pearson’s chi-squared test. Chi squared test can be used for different purposes, for example: testing … Leggi tuttoChi-squared test