Lecture 6 - Probability and Statistics in the Life Sciences...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Probability and Statistics in the Life Sciences (Spring 2010) AMS 110.02 Lecture 6 (chap5) Donghyung Lee
Background image of page 1

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

View Full DocumentRight Arrow Icon
Chapter 5 Sampling Distributions Read Section 5.1, 5.2, 5.3, 5.4, 5.5, 5.6
Background image of page 2
Section 5.3 Quantitative Observations Statistic : A numerical value calculated using information gathered from a sample. Ex) Average of weights in our class A statistic is any quantity whose value can be calculated from sample data. Prior to obtaining data, there is uncertainty as to what value of any particular statistic will result. Therefore, a statistic is a random variable and will be denoted by an uppercase letter ; a lowercase letter is used to represent the calculated or observed value of the statistic.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Section 5.3 Quantitative Observations Example 1) The sample mean, regarded as a statistic (before a sample has been selected or an experiment carried out), is denoted by ; the calculated value of this statistic is . 2) S represents the sample standard deviation thought of as a statistic, and its computed value is s . X x
Background image of page 4
Section 5.3 Quantitative Observations Sampling distribution : a sampling distribution is the probability distribution of a given statistic based on a random sample of certain size n. It may be considered as the distribution of the statistic for all possible samples of a given size. The sampling distribution depends on the underlying distribution of the population, the statistic being considered, and the sample size used. (from wikipedia.com)
Background image of page 5

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

View Full DocumentRight Arrow Icon
Section 5.3 Quantitative Observations Sampling distribution of the sample mean 1) a sampling distribution of the sample mean is the probability distribution of the sample mean based on a random sample of certain size n.
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/28/2011 for the course AMS 110 taught by Professor N/a during the Spring '08 term at SUNY Stony Brook.

Page1 / 20

Lecture 6 - Probability and Statistics in the Life Sciences...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online