void page6() {
  String t = "Step 5 - The P-value";
  textFont(myboldfont, 18);
  text(t, 30, 160);
  textFont(myfont, 18);

  float row, col;
  if ((aStudy.known == 1) || (aStudy.samplesize>30)) {

    if (testvalue>3.69) {
      t = "Use Table A.3 in the back of the book to the find the area to the left of z* (left-tailed value). Since z* = " + nf(testvalue, 1, 2) +
        ", look for the largest value possible, which are row 3.6 and column 0.09";
      drawStrings(t, 30, 190, 25);

      row = 3.6;
      col = 0.09;
    }
    else if (testvalue<-3.69) {
      t = "Use Table A.3 in the back of the book to the find the area to the left of z* (left-tailed value). Since z* = " + nf(testvalue, 1, 2) +
        ", look for the smallest value possible, which are row -3.6 and column 0.09";
      drawStrings(t, 30, 190, 25);

      row = -3.6;
      col = 0.09;
    }
    else {
      row = int(testvalue * 10.0) / 10.0;
      col = round(abs(testvalue-row) * 100.0) / 100.0;

      t = "Use Table A.3 in the back of the book to the find the area to the left of z* (left-tailed value). Since z* = " + nf(testvalue, 1, 2) +
        ", look for row " + nf(row, 1, 1) + " and column " + nf(col, 1, 2);
      drawStrings(t, 30, 190, 25);
    }

    if (row<0) {
      zvalue = (float)(Probability.normcdf(row-col));
    }
    else {
      zvalue = (float)(Probability.normcdf(row+col));
    }

    text(nf(col, 1, 2), 393, 292);
    text(nf(row, 1, 1), 260, 359);
  } 
  else {
    zvalue = (float)(Probability.tcdf(testvalue, aStudy.samplesize-1));

    if (aStudy.k == 2) {
      tcomp = (float)Probability.tinv(0.975, aStudy.samplesize-1);

      t = "Use Table A.4 in the back of the book to the estimate the right-tailed value of t*. Since this is two-tailed, look for row n - 1 = " + nf(aStudy.samplesize-1, 1) + 
        " and column t_k,0.975.";
      drawStrings(t, 30, 190, 25);
      text("t_k,0.975", 370, 295);
    }
    else {
      tcomp = (float)Probability.tinv(0.95, aStudy.samplesize-1);

      t = "Use Table A.4 in the back of the book to the estimate the right-tailed value of t*. Since this is one-tailed, look for row n - 1 = " + nf(aStudy.samplesize-1, 1) + 
        " and column t_k,0.95.";
      drawStrings(t, 30, 190, 25);
      text("t_k,0.95", 385, 290);
    }
    text("k = " + nf(aStudy.samplesize-1, 1), 250, 359);
  }

  tf3.setXY(360,342);
  image(smalldown, 395, 300);
  image(smallright, 310, 335);

  t = "What do you find in the table? Type in the following textbox (with at least 3 decimal places) then click Answer:";
  drawStrings(t, 30, 260, 25);

  fill(0, 0, 255);
  drawStrings(feedback, 30, 389, 25);

  tf3.setVisible(true);
  cb6.setVisible(false);
}