**TI86** 1 !TCONFINT!ClLCDÖDisp "SAMPLE SIZE"ÖInput MÖDisp "SAMPLE MEAN"ÖInput XÖDisp "SAMPLE DEV."ÖInput SÖDisp "CONF. LEVEL"ÖInput RÖy1=tcdf(0,x,M-1)ÖSolver(y1-R/2,x,2)ÖxQÖClLCDÖDisp "XBAR, ERROR"ÖDisp round(X,4)ÖDisp round(Q*S/(M),4)ÖDisp "CONF. INTERVAL"ÖDisp {round(X-Q*S/(M),4),round(X+Q*S/(M),4)}|_