Spreadsheet software offers great utility for all of the following reasons EXCEPT: a)-mass data entry, sorting and ease of data review b) data storage and retrieval c) complex formula calculation d) fundamental understanding of statistical concepts Calculation of the "degrees of freedom" becomes a more important calculation factor ... a) as sample sizes become smaller ( < 30 n) b) as sample sizes become larger (30 n) c) as sample sizes approach that of a Normal distribution d) as samples are selected randomly from a population Relative risk is a useful measure to ... a) compare means between independent groups b) compare confidence intervals between independednt groups c) compare proportions between independednt groups d) compare standard deviations between independent groups Oe) compare probabilities between independent groups B SENA R