1. The table below shows the time taken by a random sample of 50 students to complete a “Sudoku' puzzle. Time (minutes)

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1 The Table Below Shows The Time Taken By A Random Sample Of 50 Students To Complete A Sudoku Puzzle Time Minutes 1 (103.97 KiB) Viewed 103 times

1. The table below shows the time taken by a random sample of 50 students to complete a “Sudoku' puzzle. Time (minutes) 11 – 15 16 – 20 21 - 25 26 - 35 36 – 45 Number of students 4 8 12 16 10 Calculate the sample mean and sample standard deviation of the above distribution. (7 marks) (b) Calculate the median of the above distribution. (3 marks) (c) Using appropriate scales for both the x-axis and y-axis, draw a histogram to represent the above distribution on a graph paper (Your histogram needs to cover more than 50% of your graph paper). (3 marks) (d) Estimate the mode of the distribution from your histogram in part (c). (2 marks)