Statistics

Study of data collection, analysis, interpretation, and presentation.

Types of DataData Collection MethodsDescriptive Statistics
Probability and Probability DistributionsInferential StatisticsCorrelation and Regression
Statistics in SportsStatistics in MedicineStatistics in Business and Marketing
Reading and Interpreting GraphsAvoiding Common Statistical Mistakes
Types of DataData Collection Meth...Descriptive Statisti...Probability and Prob...Inferential Statisti...Correlation and Regr...Statistics in SportsStatistics in Medici...Statistics in Busine...Reading and Interpre...Avoiding Common Stat...
Basic Concepts

Descriptive Statistics

Summarizing Data

Descriptive statistics help us make sense of data by summarizing it in simple ways.

Key Measures

  • Mean: The average value.
  • Median: The middle value when the data is ordered.
  • Mode: The most frequent value.
  • Range: The difference between the highest and lowest values.

Visualizing Data

  • Bar Graphs
  • Pie Charts
  • Histograms

Why Use Descriptive Statistics?

They provide a quick snapshot of the data, making it easier to see patterns and make comparisons.

Formula for Mean

\[ \text{Mean} = \frac{\text{Sum of all values}}{\text{Number of values}} \]

Examples

  • Calculating the average test score in a class.

  • Making a bar graph of favorite fruits among friends.

In a Nutshell

Descriptive statistics are simple tools to summarize and visualize data.

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Probability and Probability Distributions