{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Formula sheet for final

# Formula sheet for final - Economic Statistics Econ 321...

This preview shows pages 1–2. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Economic Statistics Econ 321 Descriptive statistics: Sample mean n x x n i i = = 1 Sample variance: 1 ) ( 1 2 2-- = = n x x s n i i Sample standard deviation: 2 s s = Sample covariance: 1 ) )( ( 1--- = = n y y x x s i n i i xy Sample correlation coefficient: y x xy s s s r = Coefficient of variation % 100 = x s Weighted mean: = i i i w x w Frequency distributions : Mean: n f x x m k k k = = 1 Variance: 1 ) ( 1 2 2-- = = n f x x s m k k k x Standard deviation: 2 x x s s = Random variables: Discrete: Mean: = = ) ( ) ( x xf x E Variance: - = ) ( ) ( 2 2 x f x Binomial distribution: x n x p p x n x f-- = ) 1 ( ) ( ) 1 ( 2 p np np- = = Formula sheet for Final Exam Continuous: t: 2 2- = = df df t t 2 : df df = = 2 2 2 2 F: ) 4 ( ) 2 ( ) 2 ( 2 2 2 2 2 2--- + =- = d d n d n d d d d F F Sampling distributions : n x E x = = ) ( n p p p p E p ) 1 ( ) (- = = Interval estimation:...
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

Formula sheet for final - Economic Statistics Econ 321...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online