Identify any interaction between estimators and jobs

Assignment Help Applied Statistics
Reference no: EM131048334

Q1. The logistics department of a large firm employs three "estimators" whose job it is to decide the likely cost of delivering their products to their customers. This enables them to negotiate with Third Party Logistics (3PL) providers for an acceptable price. In order to check if there is any serious discrepancy between the methods used by the three they were each asked to produce estimates for the same four jobs. The results (in hundreds of pounds) are shown in the table below:

 

Job Number

1

2

3

4

Estimator
Humber

 

6.2

5.0

4.6

6.6

2

6.3

5.4

4.9

6.8

3

5.9

5.4

4.4

6.3

(a) Is it possible to identify any interaction between estimators and jobs? Explain your answer.

Q.2. A company making lamps has drawn a sample from its production line and measured the light output from each. The results, in microamps, are as follows:

9.1 9.8 9.5 10.4 10.7 10.2 9.8 10 10.3 10.1 9.6

At a later date second sample is drawn and tested, with the following results:

9.4 9.3 9.8 10.3 9.9 10.5 11 10 9.7 10.6

(a) Is there any evidence of a change in the performance of the lamps between the dates?

If there is a difference, calculate the 95% confidence limits for the difference.If not, calculate the 95% confidence limits for the mean light output.

Q3. The viscosity of an industrial paint, as tested by the Ford Cup method, is specified to be 34 secs ± 1 sec. Fifteen batches of the paint have been tested, and the results are shown below:

33.75 33.05 34 33.81 33.46 34.02 33.58 33.27
33.49 33.2 34.62 33 33.54 34.12 33.84

(a) From the sample, does it seem that the population mean is on target?

(b) Find the 95% confidence interval for the population mean.

(c) Using some SIMPLE test or tests, check to see if the data is "reasonably" Normal.

(d) What percentage of batches is likely to be outside the specification in the long run?

Verified Expert

Reference no: EM131048334

Questions Cloud

The canadian medical association journal : Find a two-way ANOVA. Find an example of a two-way ANOVA on the Web. The Journal of the American Medical Association (jama.ama-assn.org), Science Magazine (www.sciencemag.org), the Canadian Medical Association Journal (www.cmaj.ca), and the Journa..
Sociological survey used to collect data on demographic : Confidence in the banking system. The General Social Survey (GSS) is a sociological survey used to collect data on demographic characteristics and attitudes of residents of the United States.
What conditions privatization can be a substitute : Discuss why and under what conditions privatization can be a substitute for vertical integration or internal expansion of government services.
Identify any interaction between estimators and jobs : Does it seem that the population mean is on target - Find the 95% confidence interval for the population mean and calculate the 95% confidence limits for the difference.If not, calculate the 95% confidence limits for the mean light output.
Do you think the organization acted correctly : In the light of your review, do you think the organization acted correctly? If not, what could the managers have done to improve the ethical climate so the business decisions did not violate good ethical principles?
Anova with one observation per treatment : ANOVA with one observation per treatment (optional). If a two-way layout has just one observation for each treatment, the mean square for error (MSE) is 0 because there is no variation within each treatment group.
How many watts of power enter the eye : At night, the naked, dark-adapted eye can see a star provided the energy flux reaching the eye is 8.8 x 10-11 W/m2. Under these conditions, how many watts of power enter the eye
Write an essay about german vs us healthcare systems : Write an essay about German vs US Healthcare Systems.

Reviews

Write a Review

 

Applied Statistics Questions & Answers

  What is the correlation between the two variables

Describe the association between the number of employees respondents supervise and their life satisfaction rating? Which test did you use and was it statistically significant?

  Random sample was selected from a normal distribution

1.The following random sample was selected from a normal distribution: 4, 6, 3, 5, 9, 3.It would be useful to draw the normal curve to illustrate the confidence intervala.Construct a 90% confidence interval for the population mean.b.Construct a..

  Draw the density function

What are the possible values of this random variable and draw the density function.

  What correlations does the article indicate

In your paper, please focus on carefully discussing correlations and causations: What correlations does the article indicate? What causations does the article suggest? Be specific.

  What is the average gain of the insurance company

Suppose an insurance company charges $800 per year for a certain health insurance policy with a maximum payout of $20,000 when customer makes a claim. Each year, 3% of the customers submit a claim.What is the average gain of the insurance company per..

  What does population proportion tell us about the population

What does a population proportion tell us about the population? Explain the difference between p and pˆ. What is meant when a public opinion poll's margin of error is 3 percent?

  What happened after satellite tv became more established

Does it appear that the emergence of satellite TV had an influence on cable TV rates? What happened after satellite TV became more established in the marketplace?

  When should a standard cost variance be investigated

When should a standard cost variance be investigated? Explain why the materials price variance is often computed at the point of purchase rather than at the point of issuance.

  Experiment to reduce the probability of a type ii error

Having just made what you believe to be a Type II error, using an independent groups design and a t test analysis, name all the things you might do in the next experiment to reduce the probability of a Type II error.

  The sample mean

The population mean is within $50.00 of the sample mean?

  Obtain the difference in the mortality rates

Run the Wilcoxon rank-sum test to show whether there is a statistically significant difference between the mortality rates of children under the age of five years of the regions

  Determine the factors in the bag-sealing equipment

Determine the factors in the bag-sealing equipment that might be affecting the ease of opening the bag without tearing the inner liner of the bag.

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