(RPL) Assessment Tool Kit - WestOne

Candidate’s name
Problem 7 – Statistics
MEM50205 Diploma of Engineering – Technical (Mechanical)
Section 4 – Practical Tasks and Observation Recording Sheets
Demonstration/Observation Checklist
Skill Set 1 – Engineering foundations
Task 2 – Maths assessment
This table shows the number of faulty products found daily on a manufacturing assembly line
over a period of 40 days.
Use the data to answer the questions below:
Number of faulty products found daily over 40 days
20 21 42 11
17 26 14 14
39 14 28 8
11 35 24 27
29 18 22 20
14 29 8 14
15 10 34 31
23 30 13 18
26 19 30 14
10 15 24 23
1. What is the range of the data?
2. Construct a frequency distribution table from the data above using intervals of five.
3. Draw a histogram of frequency versus faulty products from your table.
4. Calculate the mean and median of faulty products.
5. State the modal class of frequency.
Page 87 of 206 © Department of Education and Training 2009
Version 1, July 2009