Rstudio: making predictions with regression (simple linear)
Predictions with the simple/bivariate regression model -scatterplot -how to run a simple regression - ways to obtain predictions - difference between predictive interval and confidence interval - prediction and extrapolation ... https://www.youtube.com/watch?v=b_32VfHbdxc
E(X(x-1)) is a 2nd factorial moment. Finding the factorial moment for rv~ poisson proved 2 ways - using the probability generating function of a poisson; directly from expectation of a function of a random variable
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https://www.youtube.com/watch?v=a2MGE3olzwA
A common error in computation of the CI for the mean is to use the wrong stats table. I tell you when to use what table
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https://www.youtube.com/watch?v=saxWp6h3j3A
Popularly known as the Law of iterated expectations (LIE) in econometrics, aka Law of Total Expectations, Double expectation formula - , this important theorem is explained and proved for continuous and discrete cases.
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https://www.youtube.com/watch?v=fJCsEDdc-74
The more proofs you see, the more comfortable you will be doing them!
I talk you through a proof that the expectation of a constant "a" times a random variable "X" + a constant "b" is equal to "a" times E(X) plus "b" . It's a basic result you should know.
The proof E(aX+bY)=aE(X)+bE(Y) is done in the same way as in the video. Have a go, and if you really can't do it let me know and I will do it on video :)
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https://www.youtube.com/watch?v=2q2QE-DEcNQ
Questionnaire data entry in SPSS: multiple response questions - frequency and graph
CONTENT
1:58 Examples of questions with multiple (many) answers - dichotomies and categories
6:53 Dichotomies type question - data entry and summary stats:
data entry, frequencies , % of response v % Cases
18:15 Multiple response sets (why use and how to create them)
22:25 Dealing with questions with no ticks in boxes but that are not missing values
25:34 How to make bar charts in SPSS
Date: 8 August, 2013
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https://www.youtube.com/watch?v=5BKAcErKVsQ
Restricted and unrestricted model , known also as reduced and full models. These 2 models are estimated and the sum of squares from each are used to compute the F-test to test the restriction. Standard test in regression.
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https://www.youtube.com/watch?v=r3bKvJ5osFA
How to get a partial regression plot in SPSS for multiple regression. This accompanies the presentation on the added variable plot:
https://youtu.be/z0OXMMFVyGQ
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https://www.youtube.com/watch?v=ooM-Ny4X2Hc