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Mathematics Grade 11 Unit 7: STATISTICS

24 national exam questions have come from this unit. It runs 60 pages; one careful study pass takes about 6.3 hours, and its difficulty is harder among Mathematics units. Each section below lists the questions set from it, with the year, and opens the page that teaches it.

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7.1 Types of Data · read p. 357
  • 2017 E.C., Q43 – Which of the following statement is true about types of data:
  • 2017 E.C., Q14 – Which one of the following is qualitative data?
  • 2016 E.C., Q23 – Which one of the following is a quantitative data?
7.2 Introduction to Grouped Data · read p. 360
  • 2018 E.C., Q9 – Consider the test results of 20 students in a given class. 13 14 14 15 19 18 13 15 16 16 13 14 14 15 19 18 13 15 16 16 17 18 15 13 14 16 14 18 16 16 Which one of the following numbers is the mode of the above data?
  • 2018 E.C., Q10 – Given below the ages of 40 people taken to form five football teams in a certain sport field. Ages | 10-18 | 18-26 | 26-34 | 34-42 | 42-50 No. of Peoples | 10 | 4 | 8 | 12 | 6 What is the class midpoint of the third clas
  • 2018 E.C., Q5 – Consider the following grouped data as shown in the table below. Which one of the following is the variance of the above data? Value | Frequency 1-5 | 4 6-10 | 5 11-15 | 6 16-20 | 5
  • 2017 E.C., Q11 – The table below shows a grouped frequency distribution. X | 0–9 | 10–19 | 20–29 | 30–39 | 40–49 f | 4 | 3 | 6 | 5 | 2 What is the class midpoint of the fourth class?
  • 2015 E.C., Q18 – In a certain month of the year, the temperature of a city was recorded and presented as follows: Temperature (in °C) | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 Frequency (number of days) | 2 | 9 | 11 | 5 | 3 Which one of th
7.3 Graphical Representation of Grouped Data · read p. 360
Not asked in a national paper yet.
7.4 Measures of Central Tendency and Their Interpretation · read p. 371
  • 2018 E.C., Q53 – In descriptive statistics, the third decile ($D_3$) corresponds to which percentile?
  • 2018 E.C., Q19 – Consider the following data: . Which of the following is true about the mode of the given data?
  • 2017 E.C., Q24 – Consider the following data. 12, 21, 16, 15, 10, 11, 12, 18, 9, 10, 13, 14, 15, 13, 19 Which one of the following is true?
  • 2017 E.C., Q60 – An entrance examination for a certain job was given to 35 applicants and their results are summarized in the table below. Results Number of applicants 41-50 3 51-60 14 61-70 10 71-80 5 81-90 2 91-100 1 Then which one of
  • 2017 E.C., Q25 – Which one of the following distribution is multimodal?
  • 2017 E.C., Q30 – The table given below shows the ages distribution of children in a small village in years. Age interval | Frequency (f) 2-4 | 4 5-7 | 1 8-10 | 2 11-13 | 3 Then what is the mean age of the children’s (in years)?
  • 2016 E.C., Q45 – The following table presents the scores of Grade 11 students of a certain school in a Mathematics Examination. Score | 31-40 | 41-50 | 51-60 | 61-70 | 71-80 | 81-90 | 91-100 Number of Students | 10 | 9 | 15 | 12 | 10 | 4
  • 2016 E.C., Q17 – Which one of the following is the solution set of the equation $(\frac{1}{25})^x -5(0.04)^x = 30$?
  • 2015 E.C., Q20 – The following is the distribution of the weight of 40 students in a certain class: Weight (in Kg) | 40-48 | 49-57 | 58-66 | 67-75 | 76-84 f | 8 | 18 | 7 | 5 | 2 Then for data given above, what is the median weight in kg?
  • 2014 E.C., Q42 – The following table shows the test scores of 20 students in a class. Test Scores Frequency 0 - 2 3 3 - 5 5 6 - 8 5 9 - 11 3 12 - 14 4 What is the variance of the given data?
  • 2014 E.C., Q26 – Consider the grouped frequency table for students' weight in a certain school. Weight (kg) Frequency 31 – 35 3 36 – 40 5 41 – 45 6 46 – 50 7 51 – 55 4 What is the mean weight of the student?
  • 2014 E.C., Q24 – Below is a histogram showing the time taken to complete a test. Based on the above histogram, which of the following is true?
  • 2013 E.C., Q14 – Consider the following frequency distribution graph Value 5 3 7 6 8 Frequency 3 4 5 3 5 What is the sixth decile?
7.5 Real-life Application of Statistics · read p. 405
Not asked in a national paper yet.