Control Charts and Nonconforming Proportions
Not what you're looking for?
1)Np - Chart
A receiving inspection station regularly samples 125 incoming washers to determine whether the inner diameter conforms to specifications. The number of nonconforming washers detected in the last 10 lots is shown below. Develop an np-chart to document the findings. Average, UCL, LCL Trends? Runs? Out of Control?
Lot # # Nonconforming Proportion Nonconforming
1 12
2 9
3 8
4 13
5 14
6 11
7 6
8 8
9 13
10 14
2)X S chart
A hospital administrator is studying how long an emergency room patient waits to see a physician during the midnight to 8AM shift. The study is limited to those patients who actually do see a physician, and the amount of waiting time has been carefully, operationally defined. Each day, the first 15 records are studied. Here are the results:
Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7 Day 8
2 26 19 24 40 31 39 16
32 2 18 33 22 13 41 24
8 40 15 46 23 15 8 27
30 17 18 20 40 4 37 17
38 12 18 32 34 35 17 13
24 14 18 5 7 40 48 30
31 9 44 48 23 41 36 44
46 45 3 20 27 39 32 23
49 13 28 39 31 31 40 50
32 43 47 2 45 17 30 41
32 42 44 16 23 18 38 18
10 33 3 12 45 32 22 14
43 7 13 36 15 8 1 30
27 4 37 47 43 30 33 9
41 34 5 40 5 28 13 44
Purchase this Solution
Solution Summary
Control charts and nonconforming proportions are examined.
Solution Preview
Pleasse see attached spreadsheet. I have labeled each tab for the two problems - np data, np ...
Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.