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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 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Calculate the median of the following numbers: 14,15,16,17,1814, 15, 16, 17, 18.

    A.

    15

    B.

    16

    C.

    17

    D.

    16.5

  2. 2.

    Find the range of the data set: {0,25,50,75,100}\{0, 25, 50, 75, 100\}.

    A.

    50

    B.

    75

    C.

    100

    D.

    0

  3. 3.

    Find the mode of: 11,12,13,11,14,1111, 12, 13, 11, 14, 11.

    A.

    11

    B.

    12

    C.

    13

    D.

    14

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

Cumulative Frequency and Quartiles

Subtopic

Cumulative Frequency and Quartiles under Statistics for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In a cumulative frequency graph, we plot cumulative frequency against which value of the class interval?

    A.

    Lower bound

    B.

    Midpoint

    C.

    Upper bound

    D.

    Frequency

  2. 2.

    If the frequencies are 2,4,6,82, 4, 6, 8, which of the following is the sequence of cumulative frequencies?

    A.

    2,4,6,82, 4, 6, 8

    B.

    2,6,12,202, 6, 12, 20

    C.

    2,6,10,182, 6, 10, 18

    D.

    2,8,14,202, 8, 14, 20

  3. 3.

    For a total frequency N=600N=600, the 25th25^{th} percentile is found at cumulative frequency:

    A.

    150

    B.

    25

    C.

    300

    D.

    450

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

Histograms and Frequency Polygons

Subtopic

Histograms and Frequency Polygons under Statistics for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If the frequency density is 0.250.25 and the frequency is 1010, what is the class width?

    A.

    2.5

    B.

    40

    C.

    10.25

    D.

    9.75

  2. 2.

    What is the class width for the group 32≤x<4032 \le x < 40?

    A.

    32

    B.

    40

    C.

    8

    D.

    72

  3. 3.

    If the class width is 1515 and frequency is 4545, find the frequency density.

    A.

    3

    B.

    675

    C.

    0.33

    D.

    60

Download the worksheet for Statistics - Histograms and Frequency Polygons to practice offline. It includes additional chapter-level practice questions.

Scatter Diagrams and Correlation

Subtopic

Scatter Diagrams and Correlation under Statistics for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If the equation of the line of best fit is y=−3x+10y = -3x + 10, what does the gradient tell us about the correlation?

    A.

    The correlation is positive

    B.

    The correlation is negative

    C.

    There is no correlation

    D.

    The correlation is perfect

  2. 2.

    A correlation coefficient of r=−0.45r = -0.45 is categorized as:

    A.

    Moderate positive

    B.

    Strong negative

    C.

    Moderate negative

    D.

    Weak positive

  3. 3.

    If r=−1r = -1, the relationship is described as:

    A.

    Strong negative correlation

    B.

    Perfect negative linear correlation

    C.

    Weak negative correlation

    D.

    No linear correlation

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

Box-and-Whisker Plots

Subtopic

Box-and-Whisker Plots under Statistics for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What percentage of the data is less than the upper quartile (Q3Q_3)?

    A.

    25%25\%

    B.

    50%50\%

    C.

    75%75\%

    D.

    100%100\%

  2. 2.

    Which value divides the upper half of the data into two equal halves?

    A.

    Q1Q_1

    B.

    Q2Q_2

    C.

    Q3Q_3

    D.

    Maximum

  3. 3.

    Which value divides the lower half of the data into two equal halves?

    A.

    Q1Q_1

    B.

    Q2Q_2

    C.

    Q3Q_3

    D.

    Minimum

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

Statistics - IGCSE Grade 12 Maths Notes & Revision | Krit.club