G9-MATH-L12 STATISTICS

What is the primary advantage of using graphical representations of data?

• They are more accurate than tables
• They are easier to understand
• They take less time to create
• They require no calculations

Which of the following is NOT a type of graphical representation discussed?

• Bar graphs
• Histograms
• Pie charts
• Frequency polygons

In a bar graph, what do the heights of the bars represent?

• The width of the bars
• The values of the variable
• The total number of items
• The class intervals

What is a key characteristic of a histogram?

• Bars are spaced apart
• Bars have varying widths
• Bars represent continuous data
• Bars are always the same height

When constructing a histogram, what should be done if the class intervals vary in width?

• Use equal heights for all bars
• Adjust the lengths of the bars based on area
• Ignore the widths and use average values
• Use a pie chart instead

What is the purpose of adding zero frequency class intervals when drawing a frequency polygon?

• To make the graph look better
• To ensure the polygon is closed
• To increase the number of data points
• To simplify calculations

In a frequency polygon, what do the mid-points of the upper sides of the rectangles represent?

• Class intervals
• Frequencies
• Class marks
• Total frequency

Why is it important to ensure that the areas of rectangles in a histogram are proportional to the frequencies?

• To make the graph visually appealing
• To accurately represent the data
• To simplify the drawing process
• To allow for easier comparisons

What is the scale used for representing weights in the histogram example?

• 1 cm = 1 kg
• 1 cm = 2 kg
• 1 cm = 5 kg
• 1 cm = 10 kg

What happens to the representation of data when using a frequency polygon?

• It becomes more complex
• It allows for comparison of different data sets
• It loses accuracy
• It requires fewer data points