Basic Statistics Terms
People are objects in a study
individual
Labeling variables without any quantitative values
nominal
Every 100th hamburger manufactured is checked to determine annual salaries
systematic
Census
measurements or observations from the entire populations are used
Characteristic of an individual
variable
John and Stacy ran in a race and John came 4th and Stacy came 6th.
ordinal
Nursing supervisors are selected using random numbers in order to determine annual salaries
Simple Random Sample
The group that receives the dummy treatment
Control Group
Statistics
the study of how to collect, organize, analyze and interpret numerical information from data.
Length of a book
ratio
A man stops at the mall and surveys people walking by
convenience
Method of assigning individuals into the two treatment group
Randomization
A numerical aspect of the population
parameter
Deep sea environments
interval
The principal randomly selects four classes and surveys each student in those classes
Cluster sample
Three common techniques for gathering data
Surveys
Observational Studies
Experiments
A numerical aspect of a sample
statistic
State the two levels of measurement in this scenario
ordinal and ratio level
Mail carriers of a large city are divided into four groups according to gender and according to whether they walk or ride on their routes. The 10 are selected from each group and interviewed to determine whether they have been bitten by a dog in the last year
Stratified Sample
First 3 guidelines for planning a statistical study
Identify individuals and objects of interest
Specify variables for making observations
Decide to use a population or a representative sample