void response() {
  switch(page) {
  case 1:
    if (cb1.selectedIndex()==0) {
      feedback = "Correct!";
      score += 10;
      answers[0] = "Yes";
    }
    else {
      feedback = "Incorrect. The answer is Yes.";
      answers[0] = "No";
    }
    answers[0] += ". The correct answer is Yes.";
    break;

  case 2:   
      answers[1] = tf2.getText() + ". The correct answer is " + nf(aStudy.p, 1, 2);
      if (abs(Float.parseFloat(tf2.getText())-aStudy.p)<0.01) {
        feedback = "Correct. The answer is " + nf(aStudy.p, 1, 2);
        score += 10;
      }
      else {
        feedback = "Incorrect. The correct answer is " + nf(aStudy.p, 1, 2);
      }
    break;

  case 3:
    if (aStudy.k==0) {
      answers[2] = tf2.getText() + ". The correct answer is " + nf(testl, 1, 4);
      if (abs(Float.parseFloat(tf2.getText())-testl)<0.001) {
        feedback = "Correct. The answer is " + nf(testl, 1, 4);
        score += 10;
      }
      else {
        feedback = "Incorrect. The correct answer is " + nf(testl, 1, 4);
      }
    }
    else if (aStudy.k==1) {
      answers[2] = tf2.getText() + ". The correct answer is " + nf(testu, 1, 4);
      if (abs(Float.parseFloat(tf2.getText())-testu)<0.001) {
        feedback = "Correct. The answer is " + nf(testu, 1, 4);
        score += 10;
      }
      else {
        feedback = "Incorrect. The correct answer is " + nf(testu, 1, 4);
      }
    }
    else {
      answers[2] = tf2.getText() + " and " + tf3.getText() +  ". The correct answers are " + nf(testl, 1, 4) + " and " + nf(testu, 1, 4);
      if ((abs(Float.parseFloat(tf2.getText())-testl)<0.001) && (abs(Float.parseFloat(tf3.getText())-testu)<0.001)) {
        feedback = "Correct. The answers are " + nf(testl, 1, 4) + " and " + nf(testu, 1, 4);
        score += 10;
      }
      else {
        feedback = "Incorrect. The correct answers are " + nf(testl, 1, 4) + " and " + nf(testu, 1, 4);
      }
    }
    break;
  case 4:
    if (aStudy.k==0) {
      answers[3] = tf2.getText() + ". The correct answer is " + nf(pl, 1, 4);
      if (abs(Float.parseFloat(tf2.getText())-pl)<0.001) {
        feedback = "Correct. The answer is " + nf(pl, 1, 4);
        score += 10;
      }
      else {
        feedback = "Incorrect. The correct answer is " + nf(pl, 1, 4);
      }
    }
    else if (aStudy.k==1) {
      answers[3] = tf2.getText() + ". The correct answer is " + nf(pu, 1, 4);
      if (abs(Float.parseFloat(tf2.getText())-pu)<0.001) {
        feedback = "Correct. The answer is " + nf(pu, 1, 4);
        score += 10;
      }
      else {
        feedback = "Incorrect. The correct answer is " + nf(pu, 1, 4);
      }
    }
    else {
      answers[3] = tf2.getText() + " and " + tf3.getText() +  ". The correct answers are " + nf(pl, 1, 4) + " and " + nf(pu, 1, 4);
      if ((abs(Float.parseFloat(tf2.getText())-pl)<0.001) && (abs(Float.parseFloat(tf3.getText())-pu)<0.001)) {
        feedback = "Correct. The answers are " + nf(pl, 1, 4) + " and " + nf(pu, 1, 4);
        score += 10;
      }
      else {
        feedback = "Incorrect. The correct answers are " + nf(pl, 1, 4) + " and " + nf(pu, 1, 4);
      }
    }
    break;
  case 5:
    answers[4] = tf2.getText() + ". The correct answer is " + nf(pvalue, 1, 4);
    if (abs(Float.parseFloat(tf2.getText())-pvalue)<0.001) {
      feedback = "Correct. The answer is " + nf(pvalue, 1, 4);
      score += 10;
    }
    else {
      feedback = "Incorrect. The correct answer is " + nf(pvalue, 1, 4);
    }
    break;
  case 6:
    if (pvalue<.05) {
      if (cb6.selectedIndex()==0) {
        answers[5] = "Reject Ho. The correct answer is Reject Ho";
        feedback = "Correct!";
        score += 10;
      }
      else {
        answers[5] = "Cannot reject Ho. The correct answer is Reject Ho";
        feedback = "Incorrect. The correct answer is Reject Ho";
      }
    }
    else {
      if (cb6.selectedIndex()==1) {
        answers[5] = "Cannot reject Ho. The correct answer is Cannot reject Ho";
        feedback = "Correct!";
        score += 10;
      }
      else {
        answers[5] = "Reject Ho. The correct answer is Cannot reject Ho";
        feedback = "Incorrect. The correct answer is Not sufficient evidence to reject Ho";
      }
    }
    break;
  }

  answered[page-1] = true;
}