Descriptive Statistics - University of Memphis
[Pages:29]CIVL 3103
Introduction to Descriptive Statistics
Learning Objectives
? To understand the goal of statistical methods of data analysis
? To apply multiple techniques (summary statistics, tables, graphics) to describe data, and to understand the benefits of each.
Uncertainty in Engineering
? Uncertainty is inherent in all real world problems.
? Two types of uncertainty: ? Natural randomness of underlying phenomena ? Inaccurate estimation of real-world parameters and conditions
? Statistics and probability are needed for describing information and forming the bases for design and
decision making under uncertainty.
Purpose of Probability/Statistics in Engineering
? The purpose of probability and statistics is to deal with uncertainty.
? Probability and statistics are widely used in engineering contexts to develop models or information that can be used in engineering decision-making so that the associated risks and costs are effectively managed.
Introduction to Descriptive Statistics
Descriptive vs. Inferential Statistics
DEFINITIONS
? Population ? all members of a class or category of interest ? Parameter ? a summary measure of the population (e.g.
average) ? Sample ? a portion or subset of the population collected as
data ? Observation ? an individual member of the sample (i.e., a
data point) ? Statistic ? a summary measure of the observations in a
sample
Populations and Samples
Population
Sample
Parameters
Inference
Statistics
Summary Statistics
? Measures of Central Tendency ? Arithmetic mean ? Median ? Mode
? Measures of Dispersion ? Variance ? Standard deviation ? Coefficient of variation (COV)
Measures of Central Tendency
8 6 4 10 3 8 4 8 5
The sample mean is given by:
The sample median is given by:
3 4 4 5
6
8 8 8 10
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- macro to generate summary and descriptive statistics tables pharmasug
- descriptive statistics university of memphis
- using the ti 83 84 plus chapter 2 descriptive statistics box plots
- descriptive statistics arizona state university
- data preparation descriptive statistics princeton university
- an easy to use sas macro for a descriptive statistics table
- chapter 9 descriptive statistics for bivariate data
- module 3 descriptive statistics nova southeastern university
- descriptr generate descriptive statistics
- descriptive statistics generation and trading
Related searches
- memphis university school memphis tn
- university of memphis elementary school
- how to do descriptive statistics in excel
- university of memphis football ranking
- university of memphis middle school
- descriptive statistics purpose
- descriptive statistics excel
- descriptive statistics pdf
- descriptive statistics excel 2019
- data analysis descriptive statistics excel
- descriptive statistics examples
- descriptive statistics pdf books