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Statistics

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Mean, Median, Mode, and Range

Subtopic

Mean, Median, Mode, and Range under Statistics for Grade 9 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the mean of 1,2,31, 2, 3?

    A.

    1

    B.

    2

    C.

    3

    D.

    6

  2. 2.

    Identify the mode of the following data: 5,6,5,7,5,85, 6, 5, 7, 5, 8.

    A.

    5

    B.

    6

    C.

    7

    D.

    8

  3. 3.

    Determine the median of the set 7,9,57, 9, 5.

    A.

    5

    B.

    7

    C.

    9

    D.

    21

Download the worksheet for Statistics - Mean, Median, Mode, and Range to practice offline. It includes additional chapter-level practice questions.

Histograms, Bar Charts, and Pie Charts

Subtopic

Histograms, Bar Charts, and Pie Charts under Statistics for Grade 9 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A pie chart is used to show the results of a survey of 30 people. If 5 people said 'No', what is the angle for 'No'?

    A.

    30∘30^\circ

    B.

    60∘60^\circ

    C.

    15∘15^\circ

    D.

    50∘50^\circ

  2. 2.

    In a histogram, the class 10≤w<1510 \le w < 15 and 15≤w<2515 \le w < 25 have the same frequency. Which bar will be taller?

    A.

    10≤w<1510 \le w < 15

    B.

    15≤w<2515 \le w < 25

    C.

    They will be the same height

    D.

    Cannot be determined

  3. 3.

    If a bar chart bar height is 18 and the next bar is 6, how many times higher is the first bar?

    A.

    2

    B.

    3

    C.

    4

    D.

    12

Download the worksheet for Statistics - Histograms, Bar Charts, and Pie Charts to practice offline. It includes additional chapter-level practice questions.

Cumulative Frequency and Box Plots

Subtopic

Cumulative Frequency and Box Plots under Statistics for Grade 9 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In a box plot, the distance between the minimum and the median represents what percentage of the data?

    A.

    25%25\%

    B.

    50%50\%

    C.

    75%75\%

    D.

    100%100\%

  2. 2.

    If N=160N = 160, at what cumulative frequency do we find the upper quartile?

    A.

    4040

    B.

    8080

    C.

    120120

    D.

    140140

  3. 3.

    On a cumulative frequency graph, how do you find the number of people who scored more than a certain value kk?

    A.

    Read the yy-value at kk

    B.

    Subtract the yy-value at kk from the total frequency

    C.

    Read the xx-value at the total frequency

    D.

    The yy-value at kk is the answer

Download the worksheet for Statistics - Cumulative Frequency and Box Plots to practice offline. It includes additional chapter-level practice questions.

Scatter Diagrams and Correlation

Subtopic

Scatter Diagrams and Correlation under Statistics for Grade 9 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If you are told two variables have a 'strong correlation', what does this tell you about the scatter diagram?

    A.

    The points are close to the line of best fit

    B.

    The points are far from the line of best fit

    C.

    The points are all on the xx-axis

    D.

    There are many outliers

  2. 2.

    What is the result of having more data points on a scatter diagram?

    A.

    The correlation always becomes positive

    B.

    The line of best fit becomes more reliable

    C.

    The outliers disappear

    D.

    The graph becomes univariate

  3. 3.

    Which phrase best describes the correlation when the dots on a scatter plot are very close together in a downward direction?

    A.

    Strong negative

    B.

    Weak negative

    C.

    Strong positive

    D.

    No correlation

Download the worksheet for Statistics - Scatter Diagrams and Correlation to practice offline. It includes additional chapter-level practice questions.