This document contains 18 questions about key concepts in statistics including: defining statistics and its applications; the concepts of variables, samples, populations, qualitative and quantitative variables, independent and dependent variables, scales of measurement; and how to construct various graphs like line graphs, histograms, stem-and-leaf plots, scatter diagrams; and how to classify different variables. It asks the student to apply these statistical concepts to various data sets and examples.

1. Class test
1. Define Statistics with its application in different fields.
2. What is variable? Give a few examples of it.
3. For the following table, construct a line graph
Months Aug Sep Oct Nov Dec
Share index 200 350 400 150 50
4. Explain the concept of sample and population along with their examples.
5. Explain the concept of discrete and continuous variable along with examples.
6. Explain the concept of qualitative and quantitative variable along with examples.
7. Explain the concept of independent and dependent variable along with examples.
8. Explain different scales of measurement along with examples.
9. For the following table, construct a histogram
class frequency
5 – 10 5
10 – 15 10
15 – 20 15
20 – 25 10
25 – 30 5
10. Construct a steam & leaf plot for the following data
11.
11,14,16,21,23,24,27,30,31,35,36,37,38,40,41,42,43,50,51
12. Classify the variables as quantitative/qualitative
Number of customers, Color, Marital status, Length, Number of students in BBA
13. Classify the variables as nominal/ordinal/interval/ratio
Age, Gender, Health status, Academic degree, Color, Weight, Disease status,
Place of residence, Calendar time, IQ test score.
14. Let X = age, Y = weight. Then construct a scatter diagram for the data below
X 1 2 3 4 5 6 7 8 9 10
Y 5 10 15 20 25 30 35 40 45 50
15. Classify the variables as discrete/continuous
Shirt size, Number of students in IUBAT, Weight, Volume of a 1L Coke, Shoe size
16. Write down the advantages of different graphs.
17. Write down the disadvantages of different graphs.
18. Distinguish between bar diagram and histogram.
Md. Mortuza Ahmmed