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Lecture #3 - Data Analysis

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Explain the difference between descriptive and inferential statistics. Identify the types of data and levels of measurement. Calculate relative and cumulative frequencies frequencies. Use pivot tables to explore a new data set.

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  • December 31, 2024
  • 3
  • 2024/2025
  • Class notes
  • Asim shrestha
  • Lecture #3 - data analysis
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Types of Analysis

● Exploratory data analysis
○ What kind of data do we have?
○ What do our data look like?

● Predictive analytics
○ What do we expect to happen?
○ What is the relationship between variables?

● Prescriptive analytics
○ What should we do to optimize an outcome?



Descriptive Statistics

Describe the data, particularly the shape and
distribution of values.

Examples
Mean, median, mode
Variance, standard deviation



Inferential Statistics

Draw conclusions about a population by
studying a sample.

Example
Correlation,regression
T-test
ANOVA
Test of independent proportions

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