S2: Introduction to Statistics l Graphical Des

Which of the following best defines statistics?

• The study of historical events

• The science of collecting, organizing, analyzing, and interpreting data

• The art of estimating population growth

• The process of solving equations

A population refers to:

• A subset of data taken from a group

• All members of a defined group being studied

• Only the numeric values in a data set

• The graphical summary of data

Which of the following is a quantitative variable?

• Nationality

• Type of car

• Income

• Gender

The main difference between descriptive and inferential statistics is:

• Descriptive statistics makes predictions

• Inferential statistics only uses graphs

• Descriptive statistics summarizes data, while inferential statistics draws conclusions

• Inferential statistics does not use numerical data

A bar chart is most suitable for displaying:

• Continuous data

• Categorical data

• Percentages over time

• Data with negative values

A histogram is used to represent:

• Textual data

• Discrete categorical data

• Continuous numerical data grouped into intervals

• The mode of a data set

In a pie chart, the size of each slice represents:

• The number of characters

• The relative frequency or proportion of each category

• The name of each variable

• The color assigned to each group

When constructing a histogram, which of the following is not necessary?

• Class intervals

• Class boundaries

• Frequencies

• Categories

Which level of measurement allows for meaningful calculations of differences but not for true ratios?

• Nominal

• Ordinal

• Interval

• Ratio

Which of the following graphs is most appropriate for displaying the distribution of a large set of continuous numerical data?

• Bar chart

• Pie chart

• Histogram

• Line graph