Statistics: 1.1 INTRODUCTION TO STATISTICS

what is statistics? 1 pt

a brranch of mathematics that deals with the collection, analysis, interpretation, and presentation of masses of numerical data

systematic vs random error? 2 pts

1. systematic- error in the measurement process due to an uncalibrated instrument

2. random- error produced by chance and is hard to prevent

what is meant by error? 1 pt

the difference between a value obtained from a data collection process and the true value

where can one use knowledge about statistics? 2 pts

1. in applied contexts that demand data based decision making e.g. HR, clinical psychology, daily life

2. in research

descriptive vs inferential statistics? 2 pts

1. descriptive- purpose is to organize, summarize, and communicate numerical info; used to make claims about the sample

2. inferential- purpose is to draw conclusion through the use of representative sample data; used to make claims about the population

sample vs population? 2 pts

1. sample- refers to all possible members of a group and can be any size

2. sample- refers to a limited number of members from the population