• No results found

Unit 03, Lesson 1 complete.pdf

N/A
N/A
Protected

Academic year: 2020

Share "Unit 03, Lesson 1 complete.pdf"

Copied!
6
0
0

Loading.... (view fulltext now)

Full text

(1)

Mar 1­2:22 PM

What is DATA?

Data can be organized into tables and graphs. 

DATA is the information or facts collected about a topic of study.

Mar 1­2:20 PM

What is POPULATION?

In Data Management, POPULATION refers to the group of 

people or objects which are the subject of a study.

When conducting a study, it is important to define the 

population of that study.

WHY?

Defining the population helps to focus the study further and to clarify how 

that study should be conducted.

EXAMPLE: A study is to be conducted about whether or not St. Francis Xavier High 

School should adopt uniforms. Who is the population of this study?

(2)

Mar 1­2:20 PM

What is a CENSUS?

When the entire POPULATION is studied or surveyed about a 

topic, a CENSUS has been conducted.

THE CANADIAN CENSUS

• Statistics Canada conducts a Canadian Census every 5 years. 

• Participation in the Canadian Census is mandatory and failure to participate can  lead to legal punishment.

• Information collected through the Canadian Census informs the government  about the country's demographics (ex. population and average income), and  is  used to plan public services (ex. health care, education, and transportation) or  government structure (ex. number of MPs per Province or Territory).

Mar 1­2:20 PM

Population vs. Sample

It is often unrealistic to collect data from an entire population (ie. conduct a 

CENSUS).

WHY?

A CENSUS can be too expensive, time consuming or impossible (population may be in 

flux or unreachable).

Instead, a SAMPLE of the POPULATION is selected.

A SAMPLE is a portion of the POPULATION 

chosen to represent the entire POPULATION.

• If the SAMPLE is chosen well, it will create an accurate picture of the population; in  other words, it will be representative of the population. 

• A proper sample allows INFERENCES to be made about the population. That is,  conclusions are drawn from the study of the SAMPLE and these are assumed to be  true about the entire population.

A Few Notes About Samples:

POPULATION

(3)

Mar 1­2:20 PM

Population vs. Sample

EXAMPLE:

 Mr. Curry asks the Data Management class to conduct a study to 

determine what foods should be served in the cafeteria. 

Who is the population of this study?

The population would be the staff and students of St. FX as well as the Cafeteria staff.

What would a CENSUS for the is study involve?

A CENSUS would involve surveying all the students and staff at St. FX (including the 

cafeteria staff) about their food preferences for purchase at the cafeteria.

What would a SAMPLE be for this study?

A SAMPLE for this study would be a smaller group of students and staff from St. FX 

chosen to represent the entire population.

Apr 1­1:43 PM

UNIT 03:  ORGANIZATION OF DATA

Lesson 1:  DATA:  Role, Variability, Characteristics and Type

A)  Role of Data

1. 

2.

3.

B)  Variability

1.

2.

3.

(4)

Mar 1­2:18 PM

SCALES OF MEASUREMENT DATA:

NOMINAL DATA

• have no order and thus only gives names or  labels to various categories • data has just a name • sex, species, marital status, individuals LESS ORDER MORE ORDER

INTERVAL DATA

• have meaningful intervals between  measurements, but there is no true starting  point (zero).  • has order and equal interval between levels • Celsius temperature, tide height, longitude

ORDINAL DATA

(5)

Apr 1­1:52 PM

D)

Types of Data

Primary vs. Secondary

Experimental vs. Observational

Microdata vs. Aggregate data  

Mar 1­2:22 PM

TYPES OF DATA SETS

present the total number of 

occurrences within a category, 

not individual data. 

For example, Statistic Canada 

gives a summary of data collected 

from each province.

Microdata sets

are files that show the full range of 

responses individuals complete in 

a certain category.  

For example, a table that lists out 

each individual's answers from a 

survey or questionnaire.

Take a look at the data sets shown in the tables below. Can you describe how they are different?

(6)

Apr 1­1:54 PM

clever way (try to show understanding). 

Scoring System

  

a) 5 points for each correct answer

b) +2 for every descriptor NOT used by someone in your group

c) Group winners compete against each other for class champion

Qualitative:

Quantitative:

Continuous:

Discrete:

Categorical:

Numerical:

Ordinal:

Nominal:

References

Related documents

In case the thesis is imple- mented in an R & D project of the University of Applied Sciences, the student shall act as a real developer in the project, and the project

Legend a ulnar artery; asterisk hamate hook; curved arrow deep motor branch of the ulnar nerve; d flexor digitorum profundus tendons; fpl flexor pollicis longus tendon; s

There taking several words used in the short form and it is essential oil know at full forms of those words In all fields including science education computer.. We have breast a

On the first day of the Congress, on Wednesday 3 June, 2009, we will organize a Pre Congress Workshop on topics related to museums of the history of medicine, addressing the

Risk Management in Finance and Insurance Derivative Pricing Asset Allocation Encompassing Theory Nonparametric Statistics Specification Tests Books.. - Econométrie de la

The purposes behind the requirement to keep and maintain medical records include: documentation of the patient's specific facts as to his illness; utilization as a planning tool

Pastures last year of cities complete energy autonomy leading investor in two cities not, wright said recently from rising carbon and to?. Water heater needs, cities that are

Back Painted White Glass and Eko Panels Eko Panels with Clerestory and Double Glazed Front with Framed Sliding Door.. RANGE i |