Calculate the lower and upper control limits, Basic Statistics

Assignment Help:

Question:

Data entry clerks at ARCO key in thousands of insurance records each day.  They have just completed a new training program and want to establish a control chart based on the results of this training.  Each day random samples of the work of the clerks were collected.  The results are shown in the table below.  Two hundred records were sampled daily and examined for errors.  The number of records with errors was counted.

Day

      Number of Records with Errors

Day

Number of Records with Errors

1

12

11

12

2

8

12

10

3

4

13

8

4

6

14

10

5

8

15

10

6

8

16

8

7

6

17

10

8

6

18

11

9

2

19

9

10

4

20

8

a) You want to set control limits for the proportion of records with errors.  Assume that the past twenty days performance is adequate for establishing the control limits and performing the analysis.  Using 95% control limits, what are the upper and lower control limits for the proportion of records with errors?  Calculate your proportion defective and the lower and upper control limits to 3 decimal places (0.xxx).

b) Plot the control chart and the sample values.

c)  What would you conclude about the process, in other words, is the process in control?  Explain your decision.

d)  Suppose the industry's lower and upper control limits are 0.020 and 0.050 respectively.  What can this insurance company conclude about its process relative to the industry standards?


Related Discussions:- Calculate the lower and upper control limits

Calculate the numerical value- draw the casual tree, A, Explain how a perso...

A, Explain how a person can be free to choose but his or her choices are casually determined by past event B , Draw the casual tree for newcomb's problem when Eve can't perfectl

Plot a histogram of sample hypnotized, Computer Project for Student Exam Sc...

Computer Project for Student Exam Scores The data in the excel spread sheet titled Data for Hypothesis Testing in the column titled Scores from Student Population represents m

Hierarchical clustering , Hierarchical Clustering   Five, two-dimens...

Hierarchical Clustering   Five, two-dimensional data points are shown below: x y -0.43 1.19 -1.66 1.1

Stability Criterion, Stability Criterion A survey of periodic table caref...

Stability Criterion A survey of periodic table carefully reveals that those elements in which N / Z = 1 or 1.6 are stable. Amongst these, the elements having even N and even Z ar

Profit and supply functions, Derive the profit function P (p) and the suppl...

Derive the profit function P (p) and the supply function (or correspondence) y (p)for the following three Single-output technologies, whose production functions f (z) are:

Capital outlays, Capital outlays A budgetary, financial reporting term to ...

Capital outlays A budgetary, financial reporting term to end out the expenditures for the acquisition of: addition to:, chief repair of capital assets intended to advantage prospe

Pie diagram, A survey was conducted among the residents of Pune City, its s...

A survey was conducted among the residents of Pune City, its suburbs and the Pune Cantonment area. The following three pie diagrams show their respective preferences for living in

Statics process control and improvements, 1. Warm-up Exercise Volumes I,...

1. Warm-up Exercise Volumes I, II, III, and IV of Shakespeare are in sequence next to one another in the library bookcase.  Each volume has 2" of pages and the front and back co

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd