Time (Hours)

PTTK (95% Confidence Interval)

Mean

Std. Error

Lower Bound

Upper Bound

1

37.857

1.040

35.792

39.922

2

39.939

1.070

37.815

42.063

3

42.337

1.112

40.130

44.543

4

44.929

1.201

42.545

47.312