Page 36 - Basic Statistics

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WORKED EXERCISES SHEET

Problem 2.1:

A quality control inspector found the number of defective parts from

production results for 15 production periods are as follows

3, 10, 9, 4, 6, 10, 12, 6, 10, 7, 11, 9, 1, 13, 3

a. Calculate the arithmetic mean of the data for the number of defective

parts.
b. Find median and mode for data on the number of defective parts

Worked Solution:

X 1 + X 2 + . . . X + n
a. X = = ....
n

b. Ordered Data : ……………………………………

Med = the value of the ((15 +1) / 2)th observation

= the value of the (.......)th observation
Med = …………………

= ……….

~~* CHAPTER 2 NUMERICAL MEASURES TO SUMMARIZE DATA *~~