Answer: Frequency distribution of continuous data in intervals.
- A Categorical data plotted as separate, non-adjacent bars
- B Frequency distribution of continuous data in intervals
- C A circular sector representation equivalent to a pie chart
- D Only the averages of each class interval
Correct answer: B. Frequency distribution of continuous data in intervals
Explanation: Histograms display frequency distributions of continuous data. Bars are joined (no gaps).
In a perfectly normal (bell-shaped) distribution, mean, median, and mode all coincide at the centre; about 68% of data falls within 1 standard deviation of the mean, 95% within 2, and 99.7% within 3 - the empirical rule used to judge how typical or extreme a value is.
Concept context
Mean, median, mode, standard deviation, and data interpretation