Term

Definition
Collection, organization, sumarization, and presentation of data 


Term

Definition
Group within a population 


Term

Definition
generalizing from samples to populations performing estimations and hypothesis tests, determining relationships among variables 


Term

Definition
assume values that can be counted (people, puppies, etc.) 


Term

Definition
Assume infinite number of values between any two specific values (measurements, weights, temp) 


Term
Boundaries/Class Boundaries 

Definition
if a value is "14" it means "a value between 13.5 and 14.5", same for class boundaries 


Term

Definition
just pick random people from a population 


Term

Definition
Picking like every 7th or 19th or 100000th or whatever^th 


Term

Definition
Random sampling within certain strata (ie gender, education level, location) 


Term

Definition
Picking one strata from a population and sampling all of the members of that strata. 


Term

Definition
organization of raw data using CLASSES and FREQUENCIES 


Term

Definition
must be exhaustive Must be equal in width Must be continuous Must be mutually exclusive Preferably class width is odd 


Term
Class limitboundary relationship 

Definition
if a limit is 1.856 3.856 then the boundaries are 1.85553.8565 


Term

Definition
Bar graph, bars touch, class boundaries along the x axis 


Term

Definition
class midpoint on the xaxis, frequency on yaxis, line graph 


Term

Definition
Class boundaries on xaxis, cumulative frequency on yaxis 


Term

Definition
Average all values in sample divided by number of values 


Term

Definition
If all you get is a frequency chart, find the midpoint of each class, multiply the frequency of each class by the midpoint, and divide that by the number of values 


Term

Definition
Value in middle. If there are an even number of values, average those two 


Term

Definition
Value that occurs most often 


Term

Definition
Class on a frequency chart that has the most values 


Term

Definition
lowest value plus highest value divided by two 


Term

Definition
Shown as "R", = highest valuelowest value 


Term

Definition
The proportion of values from a data set that will fall "k" standard deviations from the mean will be at least 11/k^2 where K is greater than one 


Term

Definition
Probability that B will happen, given A happening 


Term
Discrete probability distribution 

Definition
Consists of the values a random variable can assume and the corresponding probabilities of the values. 


Term

Definition
Fixed number of trials Only two outcomes each Independent outcomes Probability of success must remain same for all outcomes 


Term

Definition
Probability of success in a binomial experiment 


Term

Definition


Term

Definition
Numerical probability of failure 


Term
Standard Normal distribution 

Definition
Mean of zero Standard Deviation of one 


Term

Definition
As sample size, n, approaches infinity the distribution curve will approach normal. 

