Decimals, Fractions, and Percentages

Definition Decimals, Fractions & Percentages are different ways of showing value Examples Percent Decimal Fraction 1% 0.01 1/100 5% 0.05 5/100 10% 0.1 10/100 25% 0.25 25/100 50% 0.5 50/100 75% 0.75 75/100 100% 1 100/100 125% 1.25 125/100 150% 1.5 150/100 200% 2 200/100 Conversions Base Form Decimals Fractions Percentages Decimals – 1) multiply

Discrete and Continuous Data

Data is defined as the facts & collected for the analysis purpose. Data is divided into qualitative data (descriptive) & quantitative data. The qualitative data cannot be measured in terms of numbers. On the other hand, quantitative data is one that contains numerical values and uses range. It is divided into discrete data & continuous data. Discrete data

Bayes’ Theorem: Definition, Notation, Examples

Thomas Bayes named a theory about conditional probability. He was British mathematician in 18th century. The theorem is Bayes’ Theorem. Bayes’ theorem is used in statistics, medicine and pharmacology, finance, etc. Definition of Bayes’ Theorem Bayes’ theorem is a probability theorem when we have known another probability before. If the probability of blue ball outcomes is

Percentage Change

What Is Percentage Change? Percentage change can be applied to any quantity. Let’s say you are tracking the the grow of height. If the height increased, use the formula (New Height – Old Height)/Old Height Then, multiply that number by 100%. If the price decreased, use the formula (Old Height – New Height)/Old Height Then

Relative Frequency

Definition Relative Frequency is How often something happens divided by all outcomes. To compute relative frequency, one obtains a frequency count for a subgroup of the population and a frequency count for the total population. The relative frequency is: How to Find Relative Frequency Relative frequency = Subgroup count / Total count The above equation


Definition of Quartiles What are Quartiles? In statistics, Quartiles are values that divide your data into quarters. They aren’t shaped like pizza slices. Quartiles divide your data into 4 segments according to where the numbers fall on the number line. The 4 quarters that divide a data set into quartiles are: Lowest 25% of numbers. Next lowest


Mean is the average of the numbers. How to Find the Mean It is easy to calculate: add up all the numbers divide by how many numbers there are In other words it is the sum divided by the count Mean For Negative Numbers How to handle negative numbers? Adding a negative number is the

Conditional Probability: Dependent Events, Formula, Examples

Dependent Events Dependent events mean two or more events that occurred after the first or other events has already occurred. For examples there are dependent events in real life: Two times of taking marbles but the first is without replacement, then the second time number of marbles is change. There are three choices of a

Probability of Independent Events: Definition, Formula, Examples

What Is Independent Event? Independent means not relate with something/someone. For examples of independent condition are buying a chocolate and finding a pencil on the road, writing a letter and sweeping the floor, etc. The events in examples of independent condition are not relate each other. It is not causal relationship between of them. Probability

Frequency Distribution

Frequency is how often something occurs. Definition of Frequency Distribution We can make a Frequency Distribution table by counting frequencies. So, Frequency Distribution means: values and their frequency (how often each value occurs). Learn More Stem and Leaf Plots Percentage Change Quartiles Discrete and Continuous Data Data Index