Predicting Outcomes and Understanding Data

Probability measures how likely something is to happen, from 0 (impossible) to 1 (certain). Statistics help us collect, organize, and understand data.

Calculating Probability

\[ \text{Probability} = \frac{\text{Number of Favorable Outcomes}}{\text{Total Possible Outcomes}} \]

• Rolling a 3 on a die: \( \frac{1}{6} \)

Collecting and Displaying Data

Data is often shown in tables, charts, or graphs. Mean, median, and mode help us summarize what the data shows.

• Mean: The average.
• Median: The middle value.
• Mode: The most frequent value.

Real-World Uses

• Weather forecasts use probability to predict rain.
• Sports teams use statistics to improve performance.