transformPvs function

transformPvs

Helper function to Transform PVs onto a new metric (e.g., PISA Mean = 500, SD = 100). Uses the method described in the PISA 2012 technical manual.

transformPvs(data, mT = 0, sdT = 1, weights = 1)

Arguments

• data: A data frame or matrix that contains the PVs
• mT: The desired mean of the PVs
• sdT: The desired sd of the PVs
• weights: a vector of weights, the same length as data[1] used to calculate the mean and SD across the PVs

Returns

a List of transformed PVs with as many elements as PVs were listed in 'x'.