statistics is a branch of math that deals with a scientific collection, organization, presentation, analysis, and interpretation of numerical data
statistic method refers to the process used in the collection, presentation, analysis
The nature of statistics are collection, organization, analysis, interpretation
the measures of statistics and probability are central tendency, dispersion, and position
Descriptivestatistics is concerned with describing the properties and characteristics of data
Inferential statistics is a method with the analysis of a sample data leading to prediction, inferences, interpretation, or conclusion
Qualitative data refers to descriptive attributes that cannot be subjected to mathematical operation
Quantitative data refers to numerical info based from counting or measuring
Population refers to the totality of all elements
Parameter is any statistical information or attribute taken from a population. It is the mean of the population
Sample is a part of a population determined by sampling procedures
Statistic is any attributes taken from a sample. Mean of the sample
Variable is a specific factor, property, or characteristics of a population or a sample which differentiates a sample or group of samples from another group
dependent variable: characteristics affects each other
independent variable: characteristics do not affect each other
discrete variables: variable that can be obtain by counting, whole numbers
continuous variable: can be obtained by measuring objects or attributes, decimals, fractions, whole numbers
scales of measurement is a value of a variable or characteristics of an element called an observation or measurement
Nominal scale: depicts the presence or absence of a certain attribute. Usually involves the random assignments to represent the attribute. Data are classified into categories in which no ordering is implied
ordinal scale: data is classfied according to order or rank
interval scale: data at this level may lack inherent zero starting point. The observed data are classified into categories with ordering, direction of ranks and magnitude between ranks. Negative numbers are considered
ratio scale: modified to include the inherent zero starting point
probability : possibility
experiment is a process of investigation from which results are observed
sample space is the set of possible outcomes
outcome: possible result of an experiment
event: subset of all possible values outcomes or sample space of an experiment
theoretical probability : an approach that basses the possible probability
hearts and diamonds : red
spades and clover : black
discrete probability distribution is a table or a formula that indicates a discrete random variable and their responsibility
the sum of all probabilities of all values is equal to 1
the probability of specific value or range in the probability distribution is between 0 and 1 only