Data Processing and Representation Quiz Statistics Revision

What is the main purpose of tables in data processing and representation?

• To provide a collection of unrelated data

• To represent data in a visual format such as charts or graphs

• To collect and display a collection of data for easy access and interpretation

• To show data that is only relevant for historical analysis

What type of data is represented by two-way tables?

• Univariate data

• Qualitative data

• Secondary data

• Bivariate data

When using a pictogram to represent data, what is important to ensure about the symbols used?

• Each symbol can represent a different size

• The symbols represent numbers that cannot be easily divided

• Spacings between symbols can vary

• Each symbol is the same size and spacings are the same in each row

What should you do to find missing values in a two-way table?

• Start with the row or column that has multiple missing values

• Ignore the grand totals and calculate the missing values based on averages

• Start with the row or column that has only one value missing and use the grand totals

• Guess the missing value based on the most frequent number in the table

What is a key consideration when interpreting data from tables that have been rounded?

• The percentages shown always add up to 100%

• Rounding errors can lead to inconsistencies in column/row totals

• Rounding errors do not affect the interpretation of the data

• The data should be considered qualitative rather than quantitative

What is the purpose of having a key in a pictogram?

• To show the different colors used in the pictogram

• To indicate the artist who created the pictogram

• To show the frequency that each symbol represents

• To display the title of the pictogram

What is the main characteristic of a simple bar chart?

• Bars represent different frequencies on the x-axis

• Bars are of different widths

• Bars have unequal gaps between them

• Frequency is represented on the x-axis

What distinguishes a vertical line graph from a simple bar chart?

• It uses lines instead of bars

• It has unequal gaps between lines

• It represents frequency on the x-axis

• It cannot compare two or more sets of data

What is a key feature of multiple bar charts?

• They can only compare data from the same year

• They have a single bar for each class

• They use different colors in the bars to represent different classes as shown in the key

• They do not allow for comparison of data sets

How should the frequency of each component in a composite bar chart be calculated?

• By adding the upper frequency of that component with the lower frequency

• By multiplying the upper frequency of that component with the lower frequency

• By subtracting the upper frequency of that component with the lower frequency

• By dividing the upper frequency of that component with the lower frequency