id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crl-16142	Emmons, Mark; Wilkinson, Frances C.	The Academic Library Impact on Student Persistence	2011	24	.pdf	application/pdf	9850	466	52	So, to calculate the impact, we used the following equation to find what a change in the ratio of professional library staff will cause in the expected mean retention rate: β1 * log10 (X), where β1 is the regression coefficient and X is the percentage change; 1.1, for example, indicates an increase in 10 per- cent. In other words, in the population from which the sample was drawn, a 10 percent increase in the ratio of professional library staff predicts a 0.72 percent increase in retention.	cache/crl-16142.pdf	txt/crl-16142.txt