Purchase Solution

# 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

##### 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 ...

##### Free BrainMass Quizzes

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.