SBST1303.docx - Question 2 2 a Width = 0.8 Lower Limit = 1.8 Class 1.8 – 2.5 Lower Boundary 1.75 Upper Boundary 2.55 Frequency 2 2.6 – 3.3 2.5 2.6 2

# SBST1303.docx - Question 2 2 a Width = 0.8 Lower Limit =...

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Question 2 2. a Width = 0.8 Lower Limit = 1.8 Class Lower Boundary Upper Boundary Frequency Class Mid -point 1.8 – 2.5 1.75 2.55 2 1.8 + 2.5 = 2.15 2 2.6 – 3.3 2.5 + 2.6 = 2.55 2 3.3 + 3.4 = 3.35 2 4 2.6 + 3.3 = 2.95 2 3.4 – 4.1 3.3 + 3.4 = 3.35 2 4.1 + 4.2 = 4.15 2 6 3.4 + 4.1 = 3.75 2 4.2 – 4.9 4.1 + 4.2 = 4.15 2 4.9 + 5.0 = 4.95 2 13 4.2 + 4.9 =4.55 2 5.0 – 5.7 4.9 + 5.0 = 4.95 2 5.7 + 5.8 = 5.75 2 8 5.0 + 5.7 = 5.35 2 5.8 – 6.5 5.7 + 5.8 = 5.75 2 6.5 + 6.6 = 6.55 2 3 5.8 + 6.5 = 6.15 2 Total = 36 3. b (i) 1.8 – 2.5 2.6 – 3.3 3.4 – 4.1 4.2 – 4.9 5.0 – 5.7

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Unformatted text preview: 5.8 – 6.5 2 4 6 8 10 12 14 Lifespan (in year) for a sample of 36 batteries used in an industrial. Lifespan (in year) for a sample of 36 batteries used in an industrial. Class Frequency Histogram of Lifespan (in year) for a sample 36 batteries used in an industrial 3 . b (ii) 2.15 2.95 3.75 4.55 5.35 6.15 2 4 6 8 10 12 14 Polygon of Lifespan (in year) for a sample 36 batteries used in an industrial 3. c The Modal Class is 4.2 – 4.9, frequency 13....
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