For most articles in periodical literature,the standard deviations of quantitative data are smallerthan the corresponding means,which makes it acceptable to describethe data by x±s'.However,
In the former two issues of this periodical,we have introduced how to correctly esti mate asuitable sample size and test power for quantita-tive data of a single-group design.
文摘For most articles in periodical literature,the standard deviations of quantitative data are smallerthan the corresponding means,which makes it acceptable to describethe data by x±s'.However,
文摘In the former two issues of this periodical,we have introduced how to correctly esti mate asuitable sample size and test power for quantita-tive data of a single-group design.