andkov / psy532 Goto Github PK

Please explain in a couple of sentences the difference between reducible and irreducible error.

This issue will explore graphical means to use scatter plots and smoothers to compare observed and modelled values, as well as predictions of models with different configuration.

Connect books from the ./library.md to their TOCs stored in ./materials/texts/toc

Re-write the matrix equation below and fill in the missing information about the dimensions of the matrices.

Using the Univariate GLM matrix equation below, answer the following questons:

a) for how many subjects are there data?
b) how many dependent variables are used?
c) how many independent variables are used?
d) how many dummy variables are needed to represent the independent variable(s)?
e) re-write the equation to make it a Multivariate GLM with three outcome measures

What happened in 1921?

Your study involves two experimental conditions: A and B. Each experimental conditions has two fixed levels. You've recruited 4 individuals to be in your study, and observed the following data

a) convert the data into long/stacked format
b) draw the design matrix X for a two-way ANOVA with interactions
c) how many columns of the design matrix is needed to depict group membership information without redundancy?

@wibeasley , could you please take a look at why this child does not want to be found?

./projects/nlsy97/data_creation_report/dsL_nlsy97_annotated sources a child in the last chunk:

{r child, child = 'LinksAndRefs.Rmd'}

But I invariable get an error

Quitting from lines 123-123 (./LinksAndRefs.Rmd) 
Error in readLines(if (is.character(input2)) { : 
  cannot open the connection
Calls: <Anonymous> ... process_group.block -> call_block -> lapply -> FUN -> knit -> readLines
In addition: Warning message:
In readLines(if (is.character(input2)) { :
  cannot open file './LinksAndRefs.Rmd': No such file or directory
Execution halted

What might be the matter?

create a system of installing all necessary packages for the regular use of the repository

This issue will explore graphical solution to 1) compare observed and modeled values 2) compare predicted values from different models and 3)

I have an issue sourcing an R file from the web on mac.

Got this error:
Error in file(filename, "r", encoding = encoding) :
cannot open the connection
In addition: Warning message:
In file(filename, "r", encoding = encoding) : unsupported URL scheme

Please complete the sentence:

Happy families are all alike;________________________________________.

bonus: This is the opening sentence of what classic novel?

A Task Force was created by the APA to rule on the practice of null hypothesis significance testing. What were its key conclusions? Select the best answer.

A) NHST should be banned
B) NHST should not be banned. The statistical practice must be revised
C) NHST should not be banned, The statistical practice is in good shape
D) Researchers should decide themselves what paradigm to follow in their practice
E) Modelling should be banned as dangerous idea.

You would like to test the effect of drug X on insomnia. You recruit two groups of four subjects each, give treatment to one group, while giving placebo to the other. You then record self-reported number of hours slept on a particular night. Subjects in the treatment group report having slept 8, 10, 7, and 4 hours, while placebo group reported having slept 5, 6, 3, 8 hours.

a) organize these values the wide data set that you would analyze to test the effectiveness of Drug A. Make sure to label row and columns

b) reorganize the wide data set into a long (stacked) data set, which will be used for estimation

c) Write a scalar and matrix equations of a GLM to test the effect of drug X. Make sure to indicate the dimensions of each matrix.

For a model, how do MSE and SSE differ?

Hadley Wickham (2014) gives three features that a tidy data must possess. Name them.