Understanding Discrete and Continuous Data, Upper and Lower Bounds
This page covers the fundamental concepts of discrete and continuous data, as well as the principles of upper and lower bounds in measurements. It also provides guidance on finding suitable degrees of accuracy and performing calculations with bounds.
Definition: Discrete data are specific, countable values that can be enumerated.
Example: Examples of discrete data include the number of cars or the number of girls in a group.
Definition: Continuous data are values that can take any point within a range and cannot be counted precisely.
Example: Weight and height are examples of continuous data.
The page outlines the process for finding a suitable degree of accuracy:
- Calculate (Upper Bound + Lower Bound) / 2
- Choose a single value for the answer that would be most sensible.
Vocabulary:
- Upper bound is the largest possible value that a number can be within its error interval.
- Lower bound is the smallest possible value that a number can be within its error interval.
- Error interval is the difference between the upper and lower bounds.
The page provides a comprehensive guide to upper and lower bounds calculations:
For addition of measures: Minimum + Minimum and Maximum + Maximum
For subtraction of measures: Minimum - Maximum and Maximum - Minimum
For multiplication of measures: Minimum × Minimum and Maximum × Maximum
For division of measures: Minimum ÷ Maximum and Maximum ÷ Minimum
Highlight: To find bounds, add or subtract half the accuracy from the rounded value.
Example: For a value of 250m rounded to the nearest 10m:
Lower Bound = 245m
Upper Bound = 255m
The error interval can be expressed as an inequality: 245 < m < 255
This page serves as a valuable resource for students learning about discrete and continuous data examples, as well as upper and lower bound examples. It provides a clear explanation of how to calculate error intervals and apply them in various mathematical operations.
