Task 2 – Applications of Statistical Techniques

  1. The length in millimetres of a batch of 36 electrical components are as shown below:

2.10 2.29 2.32 2.21 2.14 2.22

2.26 2.15 2.21 2.17 2.28 2.15

2.15 2.25 2.23 2.11 2.27 2.35

2.24 2.05 2.29 2.18 2.24 2.16

2.15 2.22 2.14 2.27 2.19 2.21

2.23 2.05 2.13 2.26 2.16 2.12

  1. Form a frequency distribution table of the lengths having four classes.
  2. Form a cumulative frequency distribution table.
  • Determine the mean and the standard deviation for your grouped data.