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Q 01 / 25
Statistics deals with collection, presentation, and interpretation of data.
Q 02 / 25
Ungrouped data is also called raw data.
Q 03 / 25
Grouped data is divided into class intervals.
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The range of a dataset is calculated as highest value minus lowest value.
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Frequency is the number of times a particular value appears in the dataset.
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The sum of frequencies in a frequency distribution is equal to the total number of observations.
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Class intervals in a frequency distribution can be unequal.
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A frequency table arranges collected data into classes and their frequencies.
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There can be gaps between the bars in a histogram.
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Histograms are always drawn for continuous data.
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A bar graph is suitable for representing discrete or categorical data.
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Frequency polygons are constructed by joining midpoints of histogram tops.
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In a frequency polygon, the points are joined by straight lines.
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Continuous data must be organized into continuous class intervals before drawing a histogram.
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Cumulative frequency helps determine the number of observations below a certain class boundary.
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The range can be zero if all observations are the same.
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In statistics, data may be collected from primary or secondary sources.
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Tally marks are used for counting frequencies in ungrouped data.
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Lower and upper class limits define boundaries of a class interval.
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Pie charts are used for comparing parts of a whole in percentage terms.
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In histogram, the area of rectangle is proportional to the corresponding frequency.
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A frequency table can have decimal values as frequencies.
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Cumulative frequency increases or remains the same with each successive class.
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Class boundary is found by averaging the upper limit of one class and the lower limit of next class.
Q 25 / 25
Statistical data can only be represented as tables, not as diagrams or graphs.
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