Answer these questions

1. Kim collected data on the cost of a weekly shop by asking the rst 9 people who left the supermarket how much they spent. Below is the data she collected, rounded to the nearest pound: 13 62 33 53 21 98 7 56 61 (a) Describe the sampling method Kim used, detailing why this might have been the best choice for her sample. [2] (b) Calculate the mean for Kim's data. [2] (c) Find the median for this data. [2] 2. Chris researched how many letters were in the words on a page of his favourite book. He collected his data in the table below. Number of letters 1 2 3 4 5 6 7 8 9 I Frequency 15 24 38 39 28 19 8 3 1 I (a) Write down the mode of this data. [1] (b) Find the median number of letters in a word. [2] (c) Calculate the mean of Chris' data. [3] 3. An Engineer wants to test how strong metal rods are by seeing how much weight can be applied before they snap. (a) Explain why the Engineer shouldn't take a census. [1] A sample of the population is taken, and the data is below: Weight (kg) 0