Connecting | Class 7 Mathematics Notes

5.1 Of Questions and Statements

This section introduces the idea of statistical thinking through everyday examples. It begins with a simple scenario where you are told about the heights of two childhood friends—one 5 feet tall and the other 6 feet tall—and asks you to guess their genders. The section highlights that such guesses are based on experience and statistical observations, such as men generally being taller than women. It then introduces the concept of statistical statements, which are claims or summaries about phenomena expressed in numerical terms, proportions, probabilities, or predictions. Examples include statements about batting consistency, cycling time, pen usage duration, population changes, fruit consumption effects, and daily time spent at school. The section differentiates between statistical statements and statistical questions, emphasizing that statistical questions require data collection and analysis to answer. Examples of statistical questions include inquiries about heights of students, price comparisons of onions in different towns, and rainfall patterns. The section concludes by defining statistics as the study of collecting, organizing, analyzing, interpreting, and presenting data, setting the stage for the chapter's focus on statistical questions and data analysis.

🧪 Activity: Identify which of the following are statistical questions: (a) What is the price of a tennis ball in India? (b) How old are the dogs on this street? (c) What fraction of students like walking up a hill? (d) Do you like reading? (e) How many bricks are in this wall? (f) Who was the best bowler in the match yesterday? (g) What was the rainfall pattern in Barmer last year?

🔗 Connection: This section lays the foundation for understanding data and statistics, leading into the next section on representative values which discusses how to summarize data effectively.