Download presentation

Presentation is loading. Please wait.

Published byKevin Stephens Modified over 4 years ago

1
Agenda of Week VII. Sampling Distribution Objective : Understanding the standard normal distribution Understanding the sampling distribution Week 6 1 Random variable Normal dist. Definition Properties Example Estimation Standard Normal Sampling Dist. 32 Definition Properties

2
Review of Week VI Objective : Understanding the random variable and probability Definition Probability Random variable 1 Definition Properties Normal distribution Normal Dist. 2

3
Standard Normal Distribution o A most useful modification of ND Eq. 7.4 Characteristics: Table 7.3 pdf. and cdf.: Figure 7.9

4
Sampling Distribution o So far, under the assumption that all parameters of population is known to us, the probability of a value has been calculated

5
Sampling Distribution o Definition When a population is normally distributed,, how is the means of samples from the population distributed? o N vs. n N: the number of obs. in population (Population size) n: the number of obs. in a sample (Sample size)

6
Sampling Distribution o Possible number of samples from a population Example: N=50, n=5 o Sampling variation Figure 8.1 and Table in the top of p.296

7
Sampling Distribution o When 100 samples of 10 obs. are drawn, their sample means and s.d. are expressed as: o r.v. is defined if it has one of and can be calculated

8
Sampling Distribution o In this case, r.v. is and Z for becomes Figure in p.298 o CLT for a mean P.299

9
Sampling Distribution o Example Height of female college students: Probability that sample mean is greater than 160 and less than 163 when drawing 100 students

10
Sampling Distribution

11
o Estimation or o Point estimation Estimation of only with a value of Weakness ???

12
Sampling Distribution o Interval estimation Significant level ( ) and critical value under a s.l. ( )

13
Sampling Distribution o Interval estimation Significant level ( ) and critical value under a s.l. ( )

14
Sampling Distribution o Interval estimation Significant level ( ) and critical value under a s.l. ( )

Similar presentations

Presentation is loading. Please wait....

OK

Estimates and Sample Sizes Lecture – 7.4

Estimates and Sample Sizes Lecture – 7.4

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google

Controller area network seminar ppt on 4g Ppt on travel and tourism class 10 Ppt on joints of human body Ppt on mercedes benz india Download ppt on science and technology Ppt on advantages and disadvantages of computer hacking Ppt on 2nd world war end Ppt on world wide web Ppt on tourism in delhi and its promotion Ppt on lok sabha election 2014