Chapter1-intro to statistics part1

Statistics is ....

• a scientific method related to collected, organised, summarized, analyzed and interpret data to make decision in a study

• a scientific method related to collected, organised, summarized and interpret data to make decision in a study

• a scientific method to find something about population in a study

• a scientific method to describe the basic features of the data in a study

Descriptive statistics is

• statistical methods used to find something about population

• statistical methods used to describe data that have been collected

• statistical methods used to forecast something under study

• statistical methods used to estimate something under study

Which one is NOT refer to inferential statistics

• methods to find out something about population

• also called inductive statistics

• make inferences from data to more general conditions

• used to present quantitative descriptions in a manageable form

State the statement is whether descriptive or inferential.

a) A sales manager plotted his daily sales data and observed that sales are increasing.

• descriptive

• inferential

State the statement is whether descriptive or inferential.

b) A quality control officer detects 5% detective components after inspecting a sample of 250 components from one production run

• descriptive

• inferential

Data from primary sources always contain accurate information, true or false

• True

• False

State whether it is primary or secondary data sources.

School records

• Primary data

• Secondary data

State whether it is primary or secondary data sources.

The data from postal questionnaires

• Primary data

• Secondary data

State whether it is primary or secondary data sources..

Your course lecture note

• Primary data

• Secondary data

State whether it is primary or secondary data sources.

Information from the census

• Primary data

• Secondary data