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15 marking scheme - assignment 1 Section C

# 15 marking scheme - assignment 1 Section C - indicates that...

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Question 1 a) Sturge’s Rule: Classes = 1+1.322 [log(70)] = 7.1294 Therefore 7 classes Class Width = [104,500 - 15,000 ] / 7 = 14,071 Therefore width of 15,000 (6 marks) b) Frequency distributions, Relative Frequency, Cumulative Frequency, Cumulative Relative Frequency ( 8 marks) c) Graphs – 6 marks d) Mode + negatively (left) skewed (5 marks) Question 2 a) Qualitative, Cross-sectional, Primary, Nominal - 8 marks b) Side-by side graph, clustered bar chart, stacked bar chart -7 marks c) Bar chart + pie chart (one variable) – 7 marks d) Captions should have said specifically what each graph tells us (i.e.) This graph
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Unformatted text preview: indicates that CARE is the most popular insurance provider – 3 marks Question 3 a) Mean = 71.5 (3 marks) b) Median = 71 ( 2 marks) c) Mode = 70,75,81 ( 2 marks) d) Standard deviation = 5.99 ( 6 marks) e) Mean Absolute deviation = 4.667 (6 marks) f) Coefficient of variation = 8.38 % ( 3 marks) g) Positively (right) skewed. (3marks) Comments: Overall, the assignments were done really well. For next time, please staple your assignments. There is also no need to hand them in folders....
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