Term

Definition
Summarizes the values of a data set by using charts and graphs, averages, and tables 


Term

Definition
Make generalizations based on the descriptive stats of our sample 


Term

Definition
Entire group of people or objects to be studied. 


Term

Definition
Activities that turn inputs into outcomes 


Term

Definition


Term

Definition
VALUE that summarizes a characteristic of a POPULATION 


Term

Definition
VALUE that summarizes a chacteristic of a SAMPLE 


Term

Definition
Difference between the result of a sample and census 


Term

Definition
Using sample information to learn about a population 


Term

Definition
Single Charactersistic of any object or event 


Term

Definition
Data expressed in words usually 


Term

Definition
Data units are placed in classes and have no natural ordering 


Term

Definition


Term

Definition
Data units are ranked in some sort of order 


Term

Definition
Hotel ratings, class standing. 


Term

Definition
Data values are measured by meaningful numbers that tell how much or how many 


Term

Definition
no defined zero value, ratio is not meaningful, Valid Computation: Difference 


Term
Example of Interval Scale 

Definition


Term

Definition
Defined zero value, ratio is meaningful, Vaid computation: difference or average 


Term

Definition


Term
TRue or False: A desciptive measure of a sample is a parameter 

Definition


Term
True or False: We should determine our objective before we start collecting data 

Definition


Term
True or False:
The numbers on a jersey is qualitative data 

Definition


Term

Definition
The way that observations are spread across a range of values 


Term

Definition
A table that tabulates the number of times a variable occurs 


Term

Definition
A graph of QUALITATIVE DATA. Frequencies on vertical axes, classes on horozontal. 


Term

Definition
Frequency compared to the total. always a % 


Term

Definition
A frequency table group that covers a particular range of values. 


Term

Definition
Bar graph of quantitative data in which each bar represents a bin. The height of the bar is proportional to the number of data values in the bin. 


Term
Why do we have to define bin categories? 

Definition
So we dont hdouble count data 


Term
A cumulative Relative Frequency always totals too: 

Definition


Term

Definition
Negative, values clustered on right 


Term

Definition
Postitive, values clustered on left 


Term
True or false
A data set that is skewed left has most of the data values on the lft with a few trailing off to the right 

Definition
False: that would be skewed right 


Term
Why is a stem and leaf plot useful? 

Definition
Shows distribution of data AND contains all the original data values. 


Term
What information can we get from a stem and leaf plot? 

Definition
Min value, Max value, Median, Mode 


Term

Definition
VALUES in a data set that divide the data into 100 equal parts. 


Term

Definition
Located at the 25th, 50th, and 75th percentiles 


Term

Definition
DIFFERENCE between first and third quartiles (central 50% of data) 


Term

Definition
A pictorial display that indicates the range, median, and interquartile range 


Term
True or False:
The first quartile of a disribution can never be less than zero 

Definition
False: a value can be negative 


Term
True or False: A boxplot is a good way to show the mean of a data set 

Definition
False: Doesnt directly show the mean 


Term
True or False:
A stem and leaf plot cannot be constructed from a boxplot, but a boxplot can be constructed from a stem and leaf plot 

Definition
True: Stem and leaf has data values 


Term

Definition
Sum of all numerical observations/ total number of observations 


Term

Definition
Middle value in an ordered array of numbers
(50th Percentile) 


Term

Definition


Term

Definition
Has No Units (Independent of data) 


Term
Advantages of Arithmetic Mean 

Definition
Easy to understand, easy to compute, uses all data values 


Term
Disadvantages of Arithmetic 

Definition
Affected by Outliers, Cant compute it for openended frequency distributions 


Term
True or False: The median and mode are not affected by outliers 

Definition


Term
True or False: Every data set has a mode 

Definition


Term

Definition
Each of the values are occuring at the same times 


Term

Definition
Mean absolute deviation
Standard Deviation
Variance
Coeffiecient of variation 


Term

Definition
FInd Mean
Subtract each value from mean
Square those numbers
Then add them together and divide by number of of values
For a sample: subtract number of values by 1 


Term
How to find Standard deviation 

Definition


Term
Finding Mean absolute deviation 

Definition
Find Mean
Subtract each value by mean
Take absolute value of answers and add together
Divide by number of values 


Term
Which measures of variation measure distance from mean? 

Definition


Term
True or false: Median is a measure of variablity of a data set 

Definition


Term
Range is sensitive to all data values TRue or False 

Definition
False, only to the highest and lowest values 


Term
True or False: If we want the average of all the deviations from the mean of a data set, we can simply divide by n 

Definition


Term
Standard Deviation measures varitaion 

Definition
Fluctuation, Riskiness, Reliability, Volatility, measurement Error, Sampling Error 


Term
True or False: A standard deviation can sometimes be larger in numerical value than a variance 

Definition


Term

Definition
standard deviation/ mean of distribution times 100 


Term

Definition
68% of the data values lie within one standard deviation of the mean
95% of the data values lie within 2 standard deviations of the mean
99.7% of the data values lie within 3 standard deviations of the mean



Term

Definition
Student Score Mean score/ Standard Deviation 


Term

Definition
Goes from general to the specific 


Term

Definition
Goes from the specific to the general 


Term

Definition
process of obtaining info from data collected from a study that has unpredictable outcomes 


Term

Definition
the most basic possible outcomes of an experiment that cannot be broken down an further 


Term

Definition
collection of all possible simple events 


Term

Definition


Term
Mutually Exclusive Events 

Definition
Both events cannot occur at the same time 


Term

Definition
A 2nd event made up of all simple events not in that first event. These 2 events make up entire sample space 


Term
THe items in a sample space must be... 

Definition


Term

Definition
# of possible ways of obtaining and event/ # of replications 


Term

Definition
most common approach
# of times event occurs/ # of replications 


Term

Definition
 conditions cannot be replicated
 Probability represents an individuals judgement 


Term
True or False: When a probabilty is desrcibed in terms of the proportion of times that an event can be theoretically expected to occur, it is an example of relative frequency. 

Definition


Term
True or False:
When one throws a die 1000 times and determines that the probability of obtaining a six on a die is 1/6 that person has used the theoretical approach to probability 

Definition


Term
Discrete Probability Distribution 

Definition
Consists of whole numbers or values that have distance between them and are countable 


Term
COntinuos Probability Distribution 

Definition
Theoretically an infinite number of outcomes within a range 


Term
Requirements for a discrete 

Definition
The probability of each event must range from 01
The sum of probabilities must equal 1 


Term
True or False:
Distribution of peoples heights is an example of a discrete probability distribution 

Definition


Term
True or False:
The sum of the probabilities in a discrete probability distribution could total 1.2 

Definition


Term
Requirements for random variables: 

Definition
Numerical Values
Probabilities associated with those values dont need to be equal 


Term

Definition

