-
Question 1: What is the range of the data: 2, 5, 1, 9, 6, 3?
Solution: Range = Maximum value - Minimum value = $9 - 1 = 8$.
-
Question 2: What is the mode of the data: 2, 3, 2, 4, 2, 5, 3?
Solution: The mode is 2, as it appears most frequently.
-
Question 3: Find the mean of the first five natural numbers.
Solution: The numbers are 1, 2, 3, 4, 5. Mean = $(1+2+3+4+5)/5 = 15/5 = 3$.
-
Question 4: What is the median of the data: 2, 5, 1, 9, 6, 3?
Solution: Arranging in ascending order: 1, 2, 3, 5, 6, 9. The median is the average of the two middle terms: $(3+5)/2 = 4$.
-
Question 5: What are the three measures of central tendency?
Solution: Mean, Median, and Mode.
-
Question 6: What is the class mark of the class interval 10 - 20?
Solution: Class mark = (Lower limit + Upper limit) / 2 = $(10 + 20) / 2 = 15$.
-
Question 7: In a bar graph, what does the height of the bar represent?
Solution: The height of the bar represents the frequency of the variable.
-
Question 8: Find the mean of the first 5 whole numbers.
Solution: Whole numbers: 0, 1, 2, 3, 4. Mean = $(0+1+2+3+4)/5 = 10/5 = 2$.
-
Question 9: What is the difference between the upper limit and lower limit of a class interval called?
Solution: It is called the Class Size or Class Width.
-
Question 10: If the mean of 5 observations is 10, what is the sum of the observations?
Solution: Sum = Mean $\times$ Number of observations = $10 \times 5 = 50$.