L1-28 Group discrete data and represent grouped data graphically Quiz: Pearson Edexcel Functional Skills Maths, Unit 1

The 20 questions

1. What is the primary purpose of grouping discrete data into class intervals?

   • Simplify large data
   • Calculate exact mean
   • Increase total frequency
   • Remove all outliers

2. In the class interval 10 to 19, what is the upper boundary included?

   • 20
   • 18
   • 19
   • 10

3. Which chart type is used to display grouped discrete data?

   • Line graph
   • Scatter diagram
   • Bar chart
   • Pie chart

4. What name is given to the class interval with the highest frequency?

   • Mean class
   • Median class
   • Range class
   • Modal class

5. A grouped table has frequencies 4, 7 and 3. What is the total frequency?

   • 13
   • 14
   • 17
   • 11

6. What value is used to represent each class interval when estimating the mean?

   • Frequency
   • Lower limit
   • Midpoint
   • Upper limit

7. What is the midpoint of the class interval 20 to 29?

   • 24
   • 25
   • 20
   • 24.5

8. What does the frequency column show in a frequency table?

   • The running total
   • The total sum
   • The middle value
   • How often values occur

9. Ages of 20 people: 0 to 10 has 3, 11 to 20 has 5, 21 to 30 has 7, 31 to 40 has 5. What fraction are aged 21 to 30?

   • 3/20
   • 7/20
   • 2/7
   • 5/20

10. Heights: 150 to 159 has 6, 160 to 169 has 10, 170 to 179 has 4. What percentage are in 160 to 169?

    • 60%
    • 50%
    • 25%
    • 40%

11. A class has frequency 12 out of a total frequency of 60. What is the relative frequency?

    • 5
    • 0.2
    • 0.12
    • 0.5

12. A class interval runs from 10 to 20. What midpoint is used for it?

    • 20
    • 15
    • 14
    • 10

13. Class 10 to 19 has frequency 3 and midpoint 14.5. Class 20 to 29 has frequency 2 and midpoint 24.5. Estimate the total of all the values.

    • 92.5
    • 85
    • 98
    • 73

14. How is a class interval with a frequency of zero shown on a bar chart?

    • Broken axis
    • Empty space
    • Drawn bar
    • Negative bar

15. Shoe sizes are grouped into the class 30 to 34. Which sizes are included?

    • 30 to 33 only
    • 30, 32 and 34 only
    • 31 to 35
    • 30, 31, 32, 33 and 34

16. Groups: 0 to 9 has frequency 2, 10 to 19 has frequency 5, 20 to 29 has frequency 3. Estimate the mean using midpoints 4.5, 14.5 and 24.5.

    • 16.5
    • 14.5
    • 15.5
    • 15

17. What replaces actual values when calculating the mean of grouped data?

    • frequencies
    • midpoints
    • totals
    • averages

18. How many whole-number values are in the grouped class 100 to 199?

    • 200
    • 100
    • 99
    • 101

19. What percentage of 45 people is a group of 18?

    • 45%
    • 40%
    • 60%
    • 18%

20. Class 0 to 4 has frequency 3 and class 5 to 9 has frequency 8. What is the difference in frequency?

    • 2
    • 5
    • 11
    • 8

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