β

Z

Trend Categories

Trend Features

β > 0

2.58 < Z

4

Extremely Significant Increase

1.96 < Z ≤ 2.58

3

Significant Increase

1.65 < Z ≤ 1.96

2

Slightly Significant Increase

Z ≤ 1.65

1

Not Significant Increase

β = 0

Z

0

No Change

β < 0

Z ≤ 1.65

−1

Not Significant Decrease

1.65 < Z ≤ 1.96

−2

Slightly Significant Decrease

1.96 < Z ≤ 2.58

−3

Significant Decrease

2.58 < Z

−4

Extremely Significant Decrease