Quantitative Methods 2017

What is under the hood of your statistical software? • Compare two normally distributed series with equal variance:

1 n 1

1

2 (

x 1

- x

= x

1 - x

– s

) t

( df

+ df

m 1

- m 2

+

)

2

t =

2

1

0.975

1

2

n

1

1

2

2 (

s

+

)

1

n

n

1

2