MU0= requests a test that the population mean equals 80. ALPHA= specifies a 90 percent confidence limit for all statistics. CIBASIC computes lower confidence limits for the basic measures. CIPCTLNORMAL computes two-sided confidence limits for the quantiles. NORMAL computes tests for normality. PLOTS requests plots of the data distribution. PLOTSIZE= specifies the number of rows to display the plot. 
proc univariate data=score mu0=80 alpha=.1 cibasic(type=lower)
                cipctlnormal normal plots plotsize=26;