## Stats preliminary information

##### Created by:

kaityral  on January 20, 2010

Pop out
No Messages

# Stats preliminary information

 What are the two areas of statistics?descriptive stats and inferential stats
1/33
Preview our new flashcards mode!

Order by

#### Definitions

What are the two areas of statistics? descriptive stats and inferential stats
define descriptive stats includes collection, presentation and description of sample data
define inferential statistics refers to the technique of making decisions and drawing conclusions about populations
a single entity, usually a person or an object, whose characteristics are of intest a unit
the complete collection of units about which information is sought the population
population is the same as population of units
what are the two kinds of populations finite and infinite
finite populations contain finite number of units
infinite populations contain infinite number of units
categorize this example: all daily newspapers published in the united states finite
categorize this example: all companies listed on the new york stock exchange finite
categorize this example: all students admitted to BSU for fall 2009 finite
categorize this example: all books to be published after 2012 infinite
Any subset of a population a sample
a sample has what role? it is a representative of the population
a characteristic about each unit of a population or sample a variable
can there be several characteristics?(variables of interest) yes
this yields non-numerical information qualitative variable
another name for qualitative categorical
can one use arithmetic such as addition and averaging for data from a qualitative variable no
What are the two subgroups of qulitative variables nominal, and ordinal
define nominal places a unit into one of several groups or categories
gender, breeds of animals, colors, brand names of products are all examples of... a nominal variable
define an ordinal variable incorporates an ordered postition or ranking
level of preference, level of satisfaction, ranking are all examples of... an ordinal variable
this yields numerical measurements a quantitative variable
what is another name for quantitative numerical
can arithmetic operations be used with quantitative variables yes
what are the two subgroups of quantitative variables discrete and continuous
define a discrete variable assumes only a countable number of values
number of defects, number of students registered in courses are all examples of what... discrete variables
define continuous variable can take any one of the uncountable number of values in an interval
height weight, birth rate, SAT score, GPA score, temperature, and wind speed are all examples of what... a continuous variable

### First Time Here?

Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.