By using the midpoints of each group. calculate an estimate of the mean height.
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1 Question 1. (AQA June 2005 Intermediate Paper 2 Calculator OK) The number of goals scored in 15 hockey matches is shown in the table. Calculate the mean number of goals scored. Question 2. (AQA June 2007 Intermediate Paper 2 Calculator OK) The table shows the heights of 30 students in a class. By using the midpoints of each group. calculate an estimate of the mean height.
2 Question 3. (AQA November 2004 Intermediate Paper 2 Calculator OK) The National Curriculum levels in Mathematics for 30 students in Year 9 were recorded. Calculate the mean level in Mathematics for these students. Question 4. (AQA November 2006 Intermediate Paper 2 Calculator OK) The number of eggs in 90 nests is shown in the table. Calculate the mean number of eggs per nest.
3 Question 5. (AQA November 2007 Intermediate Paper 2 Calculator OK) A road has 30 houses. The number of letters delivered to each house on one day is given in the frequency table. (a) Calculate the mean number of letters delivered to each house. (b) A house is chosen at random. What is the probability that it has more than 3 letters delivered to it? Question 6. (Edexcel igcse June 2004 Higher Paper 3 Calculator OK) The grouped frequency table gives information about the distance each of 150 people travel to work. (a) Work out what percentage of the 150 people travel more than 20 km to work. (b) Calculate an estimate for the mean distance travelled to work by the people?
4 Question 7. (Edexcel igcse June 2006 Higher Paper 3 Calculator OK) Robin fired 15 arrows at a target. The table shows information about his scores. (a) Find his median score (b) Work out his mean score Question 8. (Edexcel igcse June 2007 Higher Paper 3 Calculator OK) Hajra counted the numbers of sweets in 20 packets. The table shows information about her results. Work out the mean number of sweets in the 20 packets.
5 Question 9. (Edexcel igcse June 2008 Higher Paper 3 Calculator OK) The table shows information about the pulse rates of 60 people, when they were resting. (a) Write down the modal class (b) Work out an estimate of the mean pulse rate for the 60 people [1 mark] Question 10. (Edexcel igcse November 2004 Higher Paper 3 Calculator OK) The table shows information about the ages of 24 students. (a) Write down the mode of these ages. (b) Calculate the mean of these ages. [1 mark] (b) Find the median of these ages.
6 Question 11. (Edexcel igcse November 2006 Higher Paper 3 Calculator OK) The table shows information about the ages of students in a school. Calculate an estimate of the mean age of these students. Give your answer to 3 significant figures. Question 12. (AQA June 2003 Higher Paper 2 Calculator OK) Jane records the times taken by 30 pupils to complete a number puzzle. (a) Calculate an estimate of the mean time taken to complete the puzzle. (b) Which time interval contains the median time to complete the puzzle? [1 mark]
7 Question 13. (AQA June 2007 Higher Paper 2 Calculator OK) A quiz has five questions. The table shows the number of correct answers given by the people who took the quiz. (a) Calculate the mean number of correct answers. You must show your working. (b) A mark of 4 is given for every correct answer. A mark of -1 is given for every blank or incorrect answer. Find the mean mark. Question 14. (AQA November 2006 Higher Paper 2 Calculator OK) A survey was taken of the amount of money spent at a supermarket by 100 shoppers on a Monday. The table shows the results. Which class interval contains the median amount? You must show your working.
8 Question 15. (AQA November 2007 Higher Paper 2 Calculator OK) The table shows the heights of 40 students. Calculate an estimate of the mean height of the students.
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