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IGCSE Statistics — practice questions

Explore 30 free Statistics questions in IGCSE Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

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Statistics questions and exercises with answers

Showing questions 1–30 of 30.

A teacher splits the value 23 for a stemplot. The stem is two and the leaf is:Read the answer and worked solution →One value in a data set sits far away from all the others. That value is called an:Read the answer and worked solution →A researcher has 400 measurements to display. The recommended graph for a set that large is a:Read the answer and worked solution →For clarity a histogram usually holds a number of bars between:Read the answer and worked solution →A histogram is drawn from boxes that touch each other, which are described as:Read the answer and worked solution →Values that divide an ordered data set into four equal parts are called:Read the answer and worked solution →Values that divide a data set into a hundred equal parts are called:Read the answer and worked solution →Before any quartile can be found, the data must first be:Read the answer and worked solution →A student scores at the 90th percentile. This means the share of scores at or below hers is:Read the answer and worked solution →A value that separates ordered data into two halves is the:Read the answer and worked solution →The middle value of the lower half of an ordered data set is the:Read the answer and worked solution →A data set has Q3 of 649,000 and Q1 of 308,750. Its interquartile range is:Read the answer and worked solution →The interquartile range describes the spread of the middle share of the data equal to:Read the answer and worked solution →A value is suspected to be an outlier if it lies beyond the quartiles by more than the IQR times:Read the answer and worked solution →The median of a data set is the same as the percentile numbered:Read the answer and worked solution →The third quartile of a data set is the same as the percentile numbered:Read the answer and worked solution →A box plot is built from the minimum, maximum, median and the two:Read the answer and worked solution →On a box plot, the two ends of the rectangular box are marked by:Read the answer and worked solution →Fifty weights are added together and the total divided by fifty. The result is the:Read the answer and worked solution →The value that appears most often in a data set is the:Read the answer and worked solution →A histogram is pulled out towards the low values, so the distribution is described as:Read the answer and worked solution →A number measuring how far the data are spread from the mean is the standard:Read the answer and worked solution →Catch the centre measuresRead the answer and worked solution →Pop the box plot valuesRead the answer and worked solution →Run the statistics gatesRead the answer and worked solution →Slice the stats wordsRead the answer and worked solution →Centre or spreadRead the answer and worked solution →Sort the statistics wordsRead the answer and worked solution →Type the numberRead the answer and worked solution →Statistics bingoRead the answer and worked solution →

Worked practice questions

A teacher splits the value 23 for a stemplot. The stem is two and the leaf is:

  1. Three
  2. Seven
  3. Eight
  4. Nine
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Correct answer: A. Three

1. A stemplot cuts each value at its final significant digit. 2. For 23 that final digit is the 3. 3. So the leaf is three. _Source: OpenStax Introductory Statistics 2e, Chapter 2, Descriptive Statistics._

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One value in a data set sits far away from all the others. That value is called an:

  1. Overload
  2. Outlier
  3. Overlap
  4. Overlay
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Correct answer: B. Outlier

1. The rest of the data sits in a clear pattern. 2. This observation does not fit that pattern at all. 3. It is an outlier. _Source: OpenStax Introductory Statistics 2e, Chapter 2, Descriptive Statistics._

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A researcher has 400 measurements to display. The recommended graph for a set that large is a:

  1. Histogram
  2. Hexagram
  3. Hologram
  4. Homogram
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Correct answer: A. Histogram

1. A stemplot works best when data sets are small. 2. A hundred values or more calls for a different display. 3. The recommended graph is a histogram. _Source: OpenStax Introductory Statistics 2e, Chapter 2, Descriptive Statistics._

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More Mathematics topics

Data HandlingDescriptive StatisticsMathematics