Term

Definition
Alpha {number}
number has to be below to accept null hypothesis?
if number above is to reject null hypothesis?
number compared with P  Value of Data Analysis 


Term

Definition
preposition to be tested;
the hypothesis under investigation
no theory
no statistical difference
"there's no statistical difference between mean set 1 and mean set 2."
do not use "increase" or "decrease" in terminology



Term

Definition
analysis difference in multiple statistics.
key phrase: statistic  significant  difference
t  Test null  hypothesis analysis of 2 data to figure out if need improvement or no improvement.
Ex: ANOVA Tests bike racks on campus to see if each racks show significant distance from rack to destination. If 1 rack is too far from destination, then there's needs to have readjustment of rack to make it closer to destination. 


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Definition
distribution of occuring with 2 modes
means of # started high, but fall in middle and then high again, not good means = no # nothing in middle 


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Definition
Select Test Method

Ex: Paired/Unpaired t  Test 


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Definition


Term
P  Value of t  Test: 0.152
{Terminology Example} 

Definition
there are equal means from any data sets
Ex: Column 1 = Column 2 


Term
P  Value of t  Test: 0.261
{Terminology Example} 

Definition
We reject the null  hypothesis;
since there are no statistical signficant differences of the means between 2 data sets. 


Term
P  Value of t  Test: 0.038
{Terminology Example} 

Definition
There are still statistical differences.



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Definition
same place
before and after of the 2 sets 


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Definition
different places
2 different groups
EX: AZ & CA 


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Definition
directional hypothesis looks at one end use either "increase" or "decrease" 


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Definition
non  directional hypothesis of any differences
between A & B



Term
"t  critical"
one  tail & two  tail 

Definition
T  statistical measure of difference of A & B 


Term
Fail to reject the null  hypothesis
means?... 

Definition


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Correlation
{Term Definition} 

Definition


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Definition
prediction & more details of data (extent X  axis)
testing for relationship NOT differences

X  input = independent
Y  input = Applicant (dependent) 


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Definition
correlation [strength not slope] coefficient between the percentage of variation between the data 


Term
R Squared (Multiple R)
{Regression} 

Definition
co  efficient determination
percentage explain by model
"variation is R Squared"
negative value 


Term
Adjusted R Squared
{Regression} 

Definition
the correlation of R squared and Adjusted R Squared
closer to the line the better 


Term
Significant F
(Significant Factor)
{Regression} 

Definition
Statistical significant relationship between A & B 


Term
P  Value of Significant F = 3.68936 E  06
{Terminology Example}


Definition
(higher than 0.05)
There is NOT statistical significant relationship between income and median house price.
We reject the null  hypothesis. 


Term
Using "Regression" Data Analysis
{what to look for} 

Definition
 P  Value NEEDS to be BELOW 0.05 of Significant F
 If above = no SSR = not valid = reject null
 If below = there IS SSR between dependent & independetn variables
 Terminology Example:
 For every point goes up, the student quality goes up by 1(Xinput/indepedent) as well
Note: 4.68E15 of P  Value is very low (bad)



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Difference
{Term Definition} 

Definition


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Relationship
{Term Definition} 

Definition


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