Normal Distribution Confidence Interval 90 Confidence Interval 90

Normal Distribution

Confidence Interval 90%

Confidence Interval 90% Level of Significance a = 10%

Confidence Interval 90% Level of Significance a = 10% a / 2 = 5%

Confidence Interval 90% Level of Significance a = 10% a / 2 = 5% -Za/2 a / 2 = 5% Za/2

Confidence Interval 90% Level of Significance a = 10% a / 2 = 5% -Za/2 = -1. 645 a / 2 = 5% Za/2 = 1. 645

Confidence Interval 95% Level of Significance a = 5% a / 2 = 2. 5% -Za/2 = -1. 96 a / 2 = 2. 5% Za/2 = 1. 96

Confidence Interval 98% Level of Significance a = 2% a / 2 = 1% -Za/2 = -2. 33 a / 2 = 1% Za/2 = 2. 33

Confidence Interval 99% Level of Significance a = 1% a / 2 = 0. 5% -Za/2 = -2. 575 Za/2 = 2. 575

Confidence Interval 90% Level of Significance a = 10% One Tail Za = 1. 28

Confidence Interval 90% Level of Significance a = 10% -Za = -1. 28 One Tail

Confidence Interval 95% Level of Significance a = 5% One Tail Za = 1. 645

Confidence Interval 95% Level of Significance a = 5% -Za = -1. 645 One Tail

Confidence Interval 98% Level of Significance a = 2% One Tail Za = 1. 96

Confidence Interval 98% Level of Significance a = 2% -Za/2 = -1. 96 One Tail

Confidence Interval 99% Level of Significance a = 1% One Tail Za = 2. 33

Confidence Interval 99% Level of Significance a = 1% -Za = -2. 33 One Tail

One Tail Two Tail Confidence Interval Level of Significance Za Z a/2 90 % 1. 28 1. 645 95 % 5% 1. 645 1. 96 98 % 2% 1. 96 2. 33 99 % 1% 2. 33 2. 575