{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# Lecture18 - ECO ECO 220Y Lecture18 Sampling Distribution...

This preview shows pages 1–8. Sign up to view the full content.

ECO 220Y Lecture18 Sampling Distribution – Part 2 Central Limit Theorem Migiwa Tanaka Reading: 9.1,9.3,9.4 1

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

View Full Document
Outline ecap of Sampling Distribution Recap of Sampling Distribution Relationship between sample size and sampling i t ib ti f distribution of mean Central Limit Theorem Application 1 pplication 2– mpling Distribution of difference of two Application 2 Sampling Distribution of difference of two means. 2
Recap mpling distribution is distribution of a statistic Sampling distribution is distribution of a statistic calculated from samples drawn from the same population. d i i t We can derive it analytically – remember the telework example. by simulation 3

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

View Full Document
Parameters of Sampling Distribution of Mean ean: Mean: ariance: X X X E ] [ 2 Variance: n X X 2 Standard Deviation: X X Homework: How do you derive these parameters? Hint: n n X X 1 Try them first by yourself and you can find solution in CD pendix I of the textbook. i i n 1 appendix I of the textbook. 4
Parameters of Sampling Distribution of Mean andard Error tandard Deviation of sample mean Standard Error : Standard Deviation of sample mean. It measures the variation of around its mean which is qual to X X equal to . It measures the magnitude of sampling errors. Why? igh S E ore likely to get remote value from X High S.E. ՜ More likely to get remote value from Low S.E. More likely to get closer value to X X 8 08 06 .0 .06 .04 . ensity Density .02 D 5 0 X X X

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

View Full Document
Relationship between sample size and sampling distribution of mean ow does the sample size n relate to the sampling distribution How does the sample size n relate to the sampling distribution of mean? nalysis of Parameters: Analysis of Parameters: Mean: X X E ] [ Standard Error: X X n X 6
Relationship between sample size and n sampling distribution of mean Each X i

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.

{[ snackBarMessage ]}

### Page1 / 20

Lecture18 - ECO ECO 220Y Lecture18 Sampling Distribution...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online