# 2420-w3 | Kitaab
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# 2420-w3

uni <date>1970-01-01 10:00</date>

### data analysis and experimental thinking

some boring statistics stuff:

- uni/bi/multi variate data
- types of data: nominal, numerical, etc
- populations vs samples
- parameter vs statistic
- summary statistics: mean, mode, etc
- using tables, plots to explain data, and how it can be misleading

important questions when understanding the distribution of numerical data:

- what is the range of the data
- what is the central tendency
- how spread out are the values

central tendency = most common: mean, median, mode variability = a single value to measure internal variation of data; range, variation, standard deviation other stats = five number summary

now we talk about different graphs

- histogram
- density plot
- box plot

bivariate data

- contingency tables = tables with 2 variables
- t-test