[Statistics] An ordinary engineer started studying statistics

Introduction

Mathematics is a little dekill Ordinary backend engineer The story of studying statistics


The key to learning

In Python 3 data analysis test I couldn't solve the statistical problem


What is statistics?

Discipline to find better ways to use data Or such fields


What is data?

Some kind of information. here Dealing with digital data


Data type

There are mainly two types. Data you already have Data not yet available


Probability

The frequency and rate at which certain data appears Example) How many times do you get a 6 when you roll the dice 10 times?


Random variable

Value that appeared by a certain probability Value calculated by affecting the probability (P) Example) 6 rolls on the dice


population

Includes data not yet available Refers to all data Example) The dice of all the world


Specimen

The data you have


Sampling

Obtaining a sample from the population The sample size is called ** sample size **.


Types of statistics

Descriptive statistics: summarizing existing data Statistical inference: Guessing data that you haven't got yet


Great cousin of statistics

Data obtained in the future You can make predictions and analyze trends.


Summary

It's hard because there are many terms Try to prepare paper properly and study math thought.


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