Statistics begins with collecting and organizing data to understand patterns and make informed decisions.
Qualitative: Categories (colors, names)
Quantitative: Numbers (height, age)
Discrete: Counted (students, cars)
Continuous: Measured (weight, time)
Survey: Questionnaires
Observation: Direct recording
Experiment: Controlled testing
Census: Entire population
| Score | Freq |
|---|---|
| 1-5 | 3 |
| 6-10 | 7 |
| 11-15 | 5 |
Bars show frequency of categories
Circles show proportions
Question 1: A survey collected ages: 12, 15, 13, 12, 14, 15, 13, 12, 14, 15. What type of data is this?
Question 2: In a frequency table, the class 10-14 has a frequency of 8. What does this mean?