You're the production manager for operation that produces circuit boards. Each board is tested at the end of manufacturing process. Rejected boards are discarded and have no future value. For product B-17, you have kept data on the number of rejects for the past 38 weeks. These data are:
Number of rejected boards.
Week Rejects
1 7
2 8
3 10
4 9
5 11
6 10
7 10
8 6
9 7
10 13
11 11
12 7
13 9
14 10
15 12
16 10
17 7
18 6
19 8
20 9
21 9
22 8
23 9
24 7
25 9
26 8
27 11
28 10
29 10
30 12
31 9
32 10
33 8
34 8
35 8
36 7
37 10
38 9
Prepare a frequency distribution chart.
What is the Standard Deviation?
What is the approximate probability that at least 7 rejected boards will be produced next week?
Be sure to clearly show how you arrived at your conclusion.
To get you started with a frequency distribution table:
Number of Boards Rejected in a Week Frequency
6 2
7 6
8 7
You will have to complete the rest of the table yourself to answer the assignment questions.