head(data_Green_Salkind_2014)
# \donttest{
# forced (simultaneous) entry; replicating the output on p. 263
OLS_REGRESSION(data=data_Green_Salkind_2014, DV='injury',
forced=c('quads','gluts','abdoms','arms','grip'))
# hierarchical entry; replicating the output on p. 265-266
OLS_REGRESSION(data=data_Green_Salkind_2014, DV='injury',
hierarchical = list( step1=c('quads','gluts','abdoms'),
step2=c('arms','grip')) )
# }
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