Statistics: Organisation of Data

Topics in this chapter

• Data Classification and Raw Data
• Frequency Distributions and Variables
• Class Intervals and Series
• Statistical Tables and Tabulation
• Cumulative Frequency and Mode

Cheat sheet

Practice questions

1. Question 1Q-1A7423

   What is meant by raw data?

   1. A.Data arranged in ascending order
   2. B.Data collected in its original, unorganised form
   3. C.Data represented only through diagrams
   4. D.Data classified into equal groups
   See the answer and solution
2. Question 2Q-FF0FBB

   The number of books read by 10 students in a month is 2, 4, 2, 5, 4, 2, 3, 5, 4, 2. What is the frequency of the value 4?

   1. A.2
   2. B.3
   3. C.4
   4. D.10
   See the answer and solution
3. Question 3Q-9A5D5F

   A grouped frequency distribution is being prepared for the heights of students. Which arrangement of class intervals follows the exclusive method and ensures that no height is counted twice?

   1. A.140–149, 150–159, 160–169
   2. B.140 ≤ h < 150, 150 ≤ h < 160, 160 ≤ h < 170
   3. C.140–150, 150–160, 160–170, with both limits included
   4. D.140–150, 151–161, 162–172
   See the answer and solution
4. Question 4Q-7D4862

   Distinguish between a discrete variable and a continuous variable, giving one suitable example of each.

   See the answer and solution
5. Question 5Q-2B986A

   A school groups students according to their preferred mode of transport as bus, bicycle, walking, and car. This is classification according to which characteristic?

   1. A.Time
   2. B.Place
   3. C.Quality
   4. D.Quantity
   See the answer and solution