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Question 1 π What type of chart is best for showing trends over time? A) Bar Chart B) Line Graph C) Pie Chart D) Stem-and-Leaf Plot
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Answer: B) Line Graph
Question 2 π What does a Pareto chart display? A) Individual and cumulative frequencies B) Only individual frequencies C) The relationship between two variables D) Skewness of data
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Answer: A) Individual and cumulative frequencies
Question 3 π Which bar chart type allows us to compare multiple groups easily? A) Simple Bar Chart B) Stacked Bar Chart C) Compound Bar Chart D) Pie Chart
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Answer: C) Compound Bar Chart
Question 4 π’ What is the mode of this dataset: 5, 7, 8, 7, 9, 10, 7, 5, 8?
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Answer: 7 (It appears the most times)
Question 5 π What is the formula for the mean (π₯Μ)?
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Answer: (Sum of all values) Γ· (Total number of values)
Question 6 π True or False: A histogram is a type of bar chart with gaps between bars.
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Answer: False (Histograms have no gaps)
Question 7 π How do you remove gaps between bars in an Excel histogram? A) Change chart type B) Reduce bar width to 50% C) Set gap width to 0% D) Use a line graph instead
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Answer: C) Set gap width to 0%
Question 8 π What is the median of this dataset: 12, 14, 15, 16, 18?
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Answer: 15 (Middle value when sorted)
Question 9 π The range of a dataset is calculated by: A) Adding all values together B) Subtracting the smallest value from the largest C) Finding the most frequent value D) Dividing the sum by the number of values
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Answer: B) Subtracting the smallest value from the largest
Question 10 π What is the standard deviation used for?
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Answer: It measures how spread out the data values are from the mean.
Question 11 π What is a frequency distribution?
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Answer: A table that shows how often each value (or range of values) appears in a dataset.
Question 12 π If the lowest value in a dataset is 10 and the highest is 50, what is the range?
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Answer: 50 - 10 = 40
Question 13 π What formula is used to determine the number of classes (k) in a frequency distribution? A) Range Γ· 2 B) Sturgesβ Rule: k = 1 + 1.44 ln(n) C) (Max + Min) Γ· 2 D) Number of data points Γ· 5
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Answer: B) Sturgesβ Rule: k = 1 + 1.44 ln(n)
Question 14 π How do you calculate class width?
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Answer: Range Γ· Number of classes (always round up).
Question 15 π If the class limits are 10-19, 20-29, 30-39, what are the class midpoints?
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Answer: (10+19)/2 = 14.5 (20+29)/2 = 24.5 (30+39)/2 = 34.5
Question 16 π What is the mean of this dataset: 4, 6, 8, 10, 12?
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Answer: (4+6+8+10+12) Γ· 5 = 8
