Test on Basic Data Processing and Presentation

Question 1: When constructing a bar chart, the dependent variable is typically plotted on the x-axis.

A. Ano

B. Ne

Explanation: The study materials state that the independent variable goes on the x-axis, and the dependent variable goes on the y-axis when drawing a bar chart.

Question 2: Is the range of data calculated by subtracting the smallest number from the largest number in the data set?

A. Ano

B. Ne

Explanation: The study materials state: 'To do this find the largest number and subtract the smallest number from it' when referring to calculating the range.

Question 3: According to the study materials, for which type of independent variable should a bar chart be used?

A. When the independent variable can be counted in chunks with no in-between value

B. When the independent variable comes in distinct categories

C. When the independent variable is used to calculate the range

D. When the independent variable is the middle value in a numerical data set

Explanation: The study materials state that if the independent variable is 'categoric (comes in distinct categories)' or 'discrete (the data can be counted in chunks, where there’s no in-between value)', a bar chart should be used. Option 0 describes a discrete variable, and option 1 describes a categoric variable. Options 2 and 3 describe aspects of calculating range and median, respectively, not conditions for using a bar chart.

Question 4: According to the study materials, which of the following are essential rules for organizing data in a table?

A. Ensure each column has a heading.

B. Use a ruler when drawing the table.

C. Include units in all column headings.

D. Present the data in numerical order within each column.

Explanation: The study materials state, 'When you draw a table use a ruler and make sure each column has a heading (including the units).' Therefore, ensuring each column has a heading, using a ruler, and including units in headings are all essential rules. Presenting data in numerical order within columns is not mentioned as a rule for tables, though putting all data in numerical order is mentioned for calculating the median.

Question 5: When calculating the density of a solid with a mass of 0.24 g and a volume of 0.715 cm³, the intermediate result from the division should be rounded to three significant figures before determining the final answer.

A. Ano

B. Ne

Explanation: The study materials state that 'If your calculation has multiple steps, *only* round the *final* answer, or it won’t be as accurate.' The example provided also shows that the final answer is rounded to the lowest number of significant figures from the initial measurements (2 s.f.), not an intermediate step.