Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: Introduction to Statistics
Description: This is a class lecture about Introduction to Statistics. You can learn about the following: • Data and Statistics • Populations and Samples • Populations and Samples • Branches of Statistics • Data Classification • Levels of Measurement
Description: This is a class lecture about Introduction to Statistics. You can learn about the following: • Data and Statistics • Populations and Samples • Populations and Samples • Branches of Statistics • Data Classification • Levels of Measurement
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
INTRODUCTION TO
STATISTICS
(Class Lecture in Statistics)
Part 1
Introduction to Statistics
2
DATA AND STATISTICS
Statistics
o the science of collecting, organizing, analyzing, and interpreting data in
order to make decisions
...
Introduction to Statistics
3
POPULATIONS AND SAMPLES
Population
Population is the set of all items or individuals of interest
...
Examples:
o 1200 voters selected at random for a survey
o A few cell phones selected for testing
o Random receipts selected for audit
Example:
In a recent survey, 250 college students at Union College were asked if they
smoked cigarettes regularly
...
Identify the population
and the sample
...
A statistic is a numerical description of a sample characteristic
...
g
...
g
...
Example:
Decide whether the numerical value describes a population parameter or a
sample statistic
...
Because the average of $325 is based on a sample, this is a sample statistic
...
Because the average of $405 is based on a population, this is a population
parameter
...
Descriptive and Inferential Statistics
Example:
In a recent study, volunteers who had less than 6 hours of sleep were four
times more likely to answer incorrectly on a science test than were participants
who had at least 8 hours of sleep
...
The statement “four times more likely to answer incorrectly” is a descriptive
statistic
...
Introduction to Statistics
6
DATA CLASSIFICATION
Data sets can consist of two types of data: qualitative data and quantitative
data
...
Which data
are qualitative data and which are quantitative data?
Introduction to Statistics
7
LEVELS OF MEASUREMENT
The level of measurement determines which statistical calculations are
meaningful
...
Nominal Level of Measurement
Data at the nominal level of measurement are qualitative only
...
Interval Level of Measurement
Data at the interval level of measurement are quantitative
...
Ratio Level of Measurement
Data at the ratio level of measurement are similar to the interval level, but a
zero entry is meaningful
Title: Introduction to Statistics
Description: This is a class lecture about Introduction to Statistics. You can learn about the following: • Data and Statistics • Populations and Samples • Populations and Samples • Branches of Statistics • Data Classification • Levels of Measurement
Description: This is a class lecture about Introduction to Statistics. You can learn about the following: • Data and Statistics • Populations and Samples • Populations and Samples • Branches of Statistics • Data Classification • Levels of Measurement