Statistics in economy using excell

The following table may be useful for completing the exam problems:

alpha

confidence estimate

one tail z

two tail z

.005

2.81

2.58

2.81

.01

2.58

2.33

2.58

.05

1.96

1.645

1.96

.10

1.645

1.28

1.645

The following table may be useful for completing the exam problems:

alpha confidence estimate one tail z two tail z

.005 2.81 2.58 2.81

.01 2.58 2.33 2.58

.05 1.96 1.645 1.96

.10 1.645 1.28 1.645