Name : Muhammad Rafi Sabila Rahman NIM : 2001576
Prodi : Teknik Sipil B
Quiz 1
INTRODUCTION STATISTICS AND PROBABILITY 1. What is the definition of statistics?
Statistics is a branch of Mathematical Science that studies how to / methods of collecting, presenting, analyze, interpretating, and make a conclusions from a group of arranged data that can be used to draw conclusions from an event.
2. What type of data do you know?
BASED ON SOURCE AND USER 1. Internal Data
Data that describes the situation of an organization, collected by that organization and used by that organization
2. External Data
Data that describes the condition outside the organization and not related to internal activities
BASED ON TIME TO COLLECT 1. CROSS SECTION DATA
Data that consist of one object but requires other related subobject that are in the parent object at one time.
2. TIME SERIES DATA
Data that collected from time to time that it can show a general direction.
BASED ON HOW TO OBTAIN 1. PRIMARY DATA
Data that collected and processed by an agency and published by that agency as well
2. SECONDARY DATA
Data that obtained indirectly or obtained trough other agency who collected it.
BASED ON CHARACTER 1. QUALITATIVE DATA
Data that explain an event based on thigs that are not numbers 2. QUANTITATIVE DATA
Data that can be calculated or analysed in a mathematical way in the form of numbers, or any data that can be calculated
3. Write examples of data using nominal and ordinal scales!
NOMINAL SCALE
Data scale that used to distinguish some qualitative object For examples
Kinds of fruits Amount
Pear 2,5 kg
Pineapple 1 kg
Apple 1,5 kg
Watermelon 2 kg
ORDINAL SCALE
Qualitative measurement scale that using a likert scale that classifies data into certain groups and given a hierarchical code
For examples
Value Category Amount
Special 10
Good 13
Average 9
Less 1
Very less 5
4. What is the definition of probability?
According to DR. Boediono (2014), probability is the degree of certainty or belief of the emergence of statistical experiment results. Probability is an index or value used to determine the degree of occurrence of an event that is random.
5. Explain the kind probability approach you know!
Classic Approach
An approach that assumes that an event has the same chance to happen
Relative Approach
The size of the probability of an event is not the same, but depends on how much an event of an entire experiment
Subjective Approach
The size of a probability is based on personal judgment
