Determine thet

-score needed to construct a90%

confidence interval for the mean income level at a company if a sample of19

employees are selected.

Here is a portion of theStudent's t-Table:

df

t

0.10

t

0.05

t

0.025

t

0.01

t

0.005

...

...............15

1.341

1.753

2.131

2.602

2.947

16

1.337

1.746

2.120

2.583

2.921

17

1.333

1.740

2.110

2.567

2.898

18

1.330

1.734

2.101

2.552

2.878

19

1.328

1.729

2.093

2.539

2.861

20

1.325

1.725

2.086

2.528

2.845

Select the correct answer below:

1.330

1.328

1.734

1.725