Introduction to Stat Terminologies, Lecture notes of Statistics

Download Introduction to Stat Terminologies and more Lecture notes Statistics in PDF only on Docsity!

DESCRIPTIVE

STATISTICS

Module Two Introduction This presentation is based on material and graphs from OpenStax and is copyrighted by OpenStax and Georgia Highlands College

Introduction

• The process of a statistical research study is the means of gathering, organizing, and analyzing data.
• The purpose of a statistical research study is to answer some question.
• Although, you may never conduct a statistical research study, you will likely read about a statistical research study in a professional journal or hear of one on the news. YOU will have to decide the validity of the researcher’s answer to the question asked.
• Knowing how to design a good research study will help you in this decision-making process

STATISTICAL RESEARCH PROCESS

• STEP 1 : State the question clearly with as much detail as possible.
  • Details help to provide context to the statistical study
  • Think: “Who, where, what, when, and why?”
• STEP 2: Identify the variable, population, sample, and sampling method - What type variable is being used? ---this determines what statistical analyses can be used - Is the sample random and representative of population? - Ideally sample is 5% of population ---small sample is any group less than 30, large sample is any group of 30 or more

STATISTICAL RESEARCH PROCESS

• STEP 3: Collect the data
  • Called “raw data” --just lists of responses
• STEP 4: Organize the data
• This is the focus of Module Two, Lesson One
• STEP 5: Analyze the data
• This is the focus of Module Two, Lessons Two, Three, and Four