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

Find the correlation coefficient, We find the correlation coefficient and p...

We find the correlation coefficient and plot the scatter plot using excel as follows:   Time in Waiting Room      Heart Rate

Cronbach alpha, How to calculate manually Cronbach alpha

How to calculate manually Cronbach alpha

Conditional probability, The U.S. Department of Transportation reported tha...

The U.S. Department of Transportation reported that during November, 83.4% of Southwest Airlines’ flights, 75.1% of US Airways’ flights, and 70.1% of JetBlue’s flights arrived on t

Chi-square Test, six subjects were exposed to 4 treatments and the followin...

six subjects were exposed to 4 treatments and the following data were recorded

Cost accounting, what is the relationship of cost accounting to financial a...

what is the relationship of cost accounting to financial and management accounting?

Capitalization policy, Capitalization policy The criteria used to decide w...

Capitalization policy The criteria used to decide which capital outlays should be reported as capital assets on the whole state are financial statements,

Var representation of sutse model, Dear expert, Assume that we have a multi...

Dear expert, Assume that we have a multivariate unobserved component model (or SUTSE, seemingly unrelated time series equation model) in STATE SPACE form, that is: Y(t) = H A(t) +

Probability mass function, how p(x)=hyper geometric distribution is probabi...

how p(x)=hyper geometric distribution is probability mass function

AUTOMATED TELLER MACHINE (ATM) , AUTOMATED TELLER MACHINE (ATM) Computer m...

AUTOMATED TELLER MACHINE (ATM) Computer managed devices placed at a financial institution division or other place, which allow a client to execute primary checking actions (such a

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