Statistics: Regression Analysis, Sampling Methods, and Quantitative Research
Regression Analysis
Regression table:
Multiple R: coefficient of correlation (0,0995) → 9,95% of variability in BMI (Y) is connected with 9,95% of the variability in age (X).
R square: coefficient of determination (0,0099) → 0,99% of variance in BMI (Y) is explained by our regression model.
St error in kg/m2: the prediction of the BMI (X) made using our model will different from reality by around 5,677 kg/m2.
Obs: we have a total of 400 obs in our model.
Intercept (B0)
Coefficients: if the age will
Read MoreUnderstanding Statistics: Techniques, Methods, and Analysis
Statistics
S: refers to the body of techniques used for collecting, organizing & interpreting data. Data may be quantitative, with values expressed numerically or qualitative with characteristics being tabulated. S is used in bs to help make better decisions by understanding variation & relationships in data.
Descriptive Statistics
Techniques that are used to summarize & describe numerical data for the purpose of easier interpretation (can be graphical or involve computational analysis)
Read MoreUnderstanding Statistical Studies: Definitions and Methods
Individuals and Variables
Individuals are objects described by a set of data (people, objects, or animals).
Leon Air Base: A Positive Work Environment and Entertaining City
This is Cadet Sargent Reboredo and, as requested, I am submitting this mail in order to give you an appropriate view of the Leon Air Base.
If you were posted with us, I am confident about you would enjoy the place.
Positive Work Environment
We have in our team a group of skilled technicians which are able to solve any breakdown or failure we have to face in our daily routines. The consequence is our aircraft fleet is ready every single day.
Entertaining City
Leon is an entertaining place to live, with
Read MoreMathematics and Statistics Practice Questions
What is the product of 
and 
?
6×3+29×2+26x-21
What is the product of 
and 
?
6×3+19×2+12x-5
What is the product of 
and 
?
6×3+24×2+x18x-12
What are the zeros of the function 
?
x=-1/2x=-4
What are the zeros of the function 
?
x=-1/2x=-3
What are the zeros of the function 
?
x=-1/2x=-2
What are the solutions of the equation 
?
½ -⅓
What are the solutions of the equation 
?
-½ ⅓
What are the solutions of the equation 
?
-½ -⅓
Which equation shows 
rewritten by completing the square?
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Understanding Generalized Linear Models and Regression Analysis
GENERAL LINEAR MODEL
y=Bo+B1X1+…+BkXk+e. They support inference and prediction. Estimation by Least Squares, Maximum Likelihood,… Interpretable, computation is fast. Simple interactions and transformations are easy. Dummy variables allow the use of categorical information.
GENERALIZED LINEAR MODEL
g(E[y|x])=Bo+B1X1+…+BpXp. Flexible: availability of alternative link functions. They relax some of the assumptions of the linear mode. Example: ogistic regression model, Poisson regression model.