Year 9 Science · Unit 4 · Lesson 13

Univariate and Bivariate Analysis

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

Sort it!

Write each question from the pool into the correct box. Decide whether each one is about one variable (univariate) or about two variables compared together (bivariate).

What is the most common shoe size in our class? Do taller students have bigger hand spans? How many hours of sleep did each student get? Does temperature affect ice cream sales? What is the typical height in Year 9? Does study time relate to test scores? How often does each eye colour appear? Does rainfall affect the number of beach visitors? What is the average daily rainfall in Sydney? Does screen time relate to hours of sleep?

Univariate (one variable)

Bivariate (two variables)

Your Turn

Fill the gap

Choose the correct word from the word bank to complete each sentence. Two words will not be used.

univariate bivariate scatter plot two-way table trend distribution positive negative centre

Analysing one variable on its own is called analysis, where you describe the of the values, that is the pattern of how they are spread. Analysing two variables together to find a relationship is called analysis. For two numerical variables the best display is a , where each point shows two values for one record. For two category variables you would use a instead. The overall direction of a relationship is called the . When the points rise from left to right, the trend is .

Show What You Know

1. Give one example of a univariate question and one example of a bivariate question. Explain how you can tell the difference.

Recall 2 marks

2. A scatter plot shows points rising from the lower left to the upper right. Describe the trend in words, and state which kind of analysis a scatter plot belongs to.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 9 Science · Unit 4 · Lesson 13 · Foundation Worksheet