11. The file read.dat contains reading data collected by Doi. Of interest is predicting WWISST2, a word identification score (stored in column 8), using TAAST1,

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11. The file read.dat contains reading data collected by Doi. Of interest is predicting WWISST2, a word identification score (stored in column 8), using TAAST1, a measure of phonological awareness stored in column 2, and SBT1 (stored in column 3), another measure of phonological awareness. Compare the OLS estimates to the estimates given by βˆ

m, βˆ

ad, and βˆ

mid.