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AU - DMS 2510 - Class Notes - Week 1

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Schools > Auburn University > Math > DMS 2510 > AU - DMS 2510 - Class Notes - Week 1

AU - DMS 2510 - Class Notes - Week 1

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background image Statistics in Health and Biology  8/22/16 1:46 PM   Chapter 1 
 
Section 1.1 
Descriptive statistics: Consists of methods for organizing and summarizing information; it 
includes the construction of graphs, charts, and tables, and the calculation of various descriptive 
measures such as averages, measures of variation, and percentiles. 
Population: The collection of all individuals or items under consideration in a statistical study. 
Sample: The part of the population from which information is obtained. 
Parameter: Numerical values describing a population. 
Statistics: Numerical values describing a sample. 
Inferential Statistics: Consists of methods for drawing and measuring the reliability of 
conclusions about a population based on information obtained from a sample of the population. 
background image Statistics in Health and Biology  8/22/16 1:46 PM   Chapter 2: 
 
Section 2.1 
Variable: A characteristic that varies from one person or thing to another 
Qualitative Variable: A nonnumerically valued variable 
Quantitative Variable: A numerically valued variable 
Discrete Variable: A quantitative variable whose possible values can be listed.  In particular, a 
quantitative variable with only a finite number of possible values is a discrete variable. 
Continuous variable: A quantitative variable whose possible values from some interval of 
numbers. 
Data: Values of variables 
Qualitative Data: Values of qualitative variable 
Quantitative Data: Values of quantitative variable. 
Discrete Data: Values of discrete variable 
Continuous Data: Values of continuous variable. 
 
Section 2.2: 
Frequency distribution of qualitative data: A listing of the distinct values and their frequencies. 
•  List the distinct values of the observations in the data set in the first column of a table  •  For each observation place a tally mark in the second column of the table in the row  of the appropriate distinct value  •  Count the tallies for each distinct value and record the totals in the third column of the  table.  Relative-frequency distribution of qualitative data: is a listing of distinct values and their relative 
frequencies. 
•  Obtain a frequency distribution of data divide each frequency by the total number of  observations  Pie Chart: A disk divided into wedge-shaped pieces proportional to relative frequencies of 
qualitative data. 
•  Obtain a relative-frequency distribution of the data  •  Divide a disk into wedge-shaped pieces proportional to the relative frequencies  •  Label the slices with distinct values and their relative frequencies  Bar Chart: Displays the distinct values of the qualitative data on a horizontal axis and the relative 
frequencies (or frequencies or percent) of those values on a vertical axis. The relative frequency 
of each distinct value is represented by a vertical bar whose height is equal to the relative 
frequency of that value. The bars should be positioned so that they do not touch each other. 

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School: Auburn University
Department: Math
Course: Statistics for Health Sciences
Professor: Regina Halpert
Term: Fall 2015
Tags: Statistics
Name: STAT 2510
Description: Class notes from week 1
Uploaded: 08/23/2016
6 Pages 24 Views 19 Unlocks
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