Identifying and Describing Associations - Review Quiz

During a hybridisation experiment a scientist counted the tall and dwarf marigold plants. This is an example of..

• Categorical data

• Nominal data

• Discrete data

• Continuous data

The graph shows the number of days of each weather type for the Gold Coast in January. Choose the option below that best describes this data.

• Univariate and numerical data

• Univariate and categorical data

• Bivariate and categorical data

• Bivariate and numerical data

A researcher took 100 blood samples from a group of volunteers. He wanted to determine if there is a relationship between the amount of iron present in the blood and the amount of vitamin C present in the blood.

Choose the option below that describes the best method of displaying his results.

• Stem and leaf plot

• Line graph

• Two-way frequency table

• Scatterplot

The following two-way frequency table shows the composition of left- and right-handed students in Years 11 and 12 at a school.

The percentage of all left-handers who are in Year 11 is closet to...

• 6.8%

• 12.5%

• 14.3%

• 40%

Using the same two-way frequency table, the percentage of Year 12 students who are left-handed is closet to...

• 6.8%

• 12.5%

• 14.3%

• 40%

From the data displayed in the same two-way frequency table, the difference between the percentage of all right-handers in Year 11 and Year 12 is...

• 7.7%

• 6.8%

• 10.9%

• 47.7%

The following two-way frequency table shows the results of a trial on new metal detectors for aircraft. The metal detector scans a piece of hand luggage and lights up if metal is found.

Based on the results, the chance of metal going undetected in a piece of hand luggage is...

• 1%

• 10%

• 25%

• 75%

A researcher administers different amounts of fertiliser to a number of trial plots of potato crop. She then measures the total mass of potatoes harvested from each plot. When drawing the scatterplot, the researcher should graph...

• mass of harvest on the x-axis because it is the explanatory variable, and amount of fertiliser on the y-axis because it is the response variable

• mass of harvest on the y-axis because it is the explanatory variable, and amount of fertiliser on the x-axis because it is the response variable

• mass of harvest on the x-axis because it is the response variable, and amount of fertiliser on the y-axis because it is the explanatory variable

• mass of harvest on the y-axis because it is the response variable, and amount of fertiliser on the x-axis because it is the explanatory variable.

Which of the following graphs best depicts a strong negative relationship between the two variables?

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• 
• 
• 

What type of relationship is shown by the graph?

• Strong positive relationship

• Moderate positive relationship

• Moderate negative relationship

• Strong negative relationship