STATS 11 - Terms of Statistics and Probability to Standard Deviation

Statistics

it is a mathematical discipline to collect and summerize data and is the study of collection, analysis, interpretation, presentation, and organization of data

Probability

means possibility and deals with the occurence of random events

Random variable

is a function that assigns a real number to each element of a sample space

Discrete

can take only countable values with a subset of natural numbers, its a finite number of distinct values and whole number

Continuous

infinite number of values with measurable quantities and its set of possible values is from a range of real numbers

Probability distribution function

is a function P(x) that shows the relative probability that each outcome of an experiment will happen

Probability mass function

is a probability distribution function of a discrete probability distribution

Non-negativity property

each of the probabilities, p(x) has value which range from 0 through 1

Norming property

the sum of the probabilities equal to 1

Numerical data

it is the data that involves quantities that can be measured/counted and its 2 types is continuous and discrete

Categorical data

it is the data that represents characteristics/qualities and its 2 types is nominal and ordinal

Mean

x with a discrete probability distribution is a weighted average

Variance

measure of a spread dispersion of the values of a random variable from the mean

Standard deviation

a computed measure of how much scores vary around the mean score