Question

In: Statistics and Probability

Answer the following questions and upload to Canvas. Submit in Word or PDF format.  Show your work...

Answer the following questions and upload to Canvas. Submit in Word or PDF format.  Show your work and upload the Excel sheet as well. All the writing parts must be your original writing, don't quote, write in your own words.

The following table presents the orders of Samson Company for the last 36 months (3 years).

Month

Order Year 1

Order Year 2

Order Year 3

January

502

614

712

February

408

592

698

March

491

584

686

April

456

532

644

May

481

599

694

June

511

604

702

July

522

624

724

August

500

612

716

September

510

625

732

October

512

627

740

November

520

650

745

December

536

680

756

  1. Use the data in the above table and regression analysis to forecast the orders for the next 12 months (4th year). Include your excel work sheet and your work in your write up. Show the regression equation, values of intercept, slope, correlation coefficient and coefficient determination and the forecast of orders for the next 12 months.
  2. Explain how you could make your forecast’s results more reliable by incorporating a qualitative research to your quantitative results.

Solutions

Expert Solution

Regression output

SUMMARY OUTPUT
Regression Statistics
Multiple R 0.96639242
R Square 0.9339143
Adjusted R Square 0.93197061
Standard Error 24.9413658
Observations 36
ANOVA
df SS MS F Significance F
Regression 1 298895.2001 298895.2 480.4835 1.22696E-21
Residual 34 21150.43882 622.0717
Total 35 320045.6389
Coefficients Standard Error t Stat P-value Lower 95% Upper 95%
Intercept 444.425397 8.490072288 52.34648 4.34E-34 427.1714941 461.6793
Period ( t) 8.77129987 0.400151751 21.91993 1.227E-21 7.958093678 9.58450606

Regression equation:

Order ( y ) = 444.425 + 8.771 ( Period )

slope ; 8.771

intercept ; 444.425

Coefficient of determination (R2) = 0.9339

Correlation coefficient (R) ) = 0.9664

forecast the orders for the next 12 months (4th year) :

Period

Forecast

( y = 444.425 + 8.771 ( Period ))

Rounded off

37 769
38 778
39 787
40 795
41 804
42 813
43 822
44 830
45 839
46 848
47 857
48 865

2)

For qualitative research, we have to see whether there is any chance disruption in the industry or economy for the next year etc.

if there is a election and calamity etc, the price of the products and hence the demand may be affected.

In those cases, we must factor the above quantitative forecast figures with expert opinion. Otherwise, if the industry, economy and other external factors remain stable, we can use the above figures.


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