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Worksheet Difficulty:1 Easy Learning Objeetive: 03-1 4

Problem 3-24 Compute and use regression and correlation coeff cie nts.

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Problem 3-15 The manager of a fashionable restaurant open Wedneday through Saturday says that the rcstaurant does about 33 percent of its business on Friday night, 28 Frcent on Saturday night, and 19 percent on Thursday night. What seasonal relatives would describe this situation?(Round your answers to 2 decimal places.)

Wednesday

Thursday

Friday

Saturday

Worksheet

Problem 3-1 5

Difrculty:2 Medium

Leaming Objedive: 03-1 3 Compub and use seasonal relatives.

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Problem 3-20 An analyst must decide between two different forecasting techniques for weekly sales of roller blades: a linear trend equation and the naive approach. The linear trend equation is F1 = 122 + 2.Ot, and it was developed using data from periods '1 through 10. Based on data for penods 11 through 20 as shown in the table, which of these two methods has the greater accuracy if MAD and MSE are used?

I Units Sold 11 147 12 148 13 151 14 146 15 155 16 152 17 156 18 157 19 158 20 167

MAD (Naive) MAD (Linear) MSE (Naive)

MSE (Linear)

(Click to select) v provides forecasts with less average enor and iess average squared enor.

Worksheet

Problem 3-20

Difficulty:2 Medium

Leaming Objective: 03-05 Summarize forecast enors and use summaries to make decisions.

Leaming Objective:03-07 Use a naive method to make a forecast.

Learning Objective: 03-11 Prepare a linear trend forecast.

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b. Determine the delivery charge for transporting a SGpound parcel 20 intermediate calculation. Round your answer to 2 decimal places. response.)

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Problem 3-24 Timely Transport prcvides local delivery service for a number of downtorrvn and suburban businesses. Delivery charges are based on distance and weight involved for each delivery: 30 cents per pound and 20 cents per mile. Also, there is a $20 handling fee per parcel.

a. Develop an expression that summarizes delivery charges. (Round your answers to 2 decimal places. Omit the "$" sign in your response.)

y= $ xt+$ xz+$

miles. (Do not round your Omit the "$" sign in your

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worksheet Difficutty: 2 Medium !-l:l:q ?:l::l'-' 03-08 Preparea moving average forecast. probtem 3_2 Learning Objective:03-07 Use a Learning Objective:03-10 Prepare

naive method to make a forecast. an exponential smoothing forecast.

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Problem 3-7 Freight car loadings over an 1&week period at a btsy port are as follcurs:

Week Number Week Number Week Numben 1 400 7 &5 13 575 2 41S I 495 14 580 3 430 I 525 15 610 4 415 10 510 16 625 5$Afi*4 17640 6 435 12 570 18 655

a. Determine a linear trend line for expecied fr€ight car loadings. (Do not round intermediate calculations. Round your final answens to 2 decimal places.)

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b. Use the above trcnd quation to predict expected loadirgs for Weeks n & 21. (Round your final answers to 2 decimal places.)

The forecasted demand for Week 20 is and for Week 21 is

c. The rnanager intends to install new equipment when tle volume exceeds 980 loadings per week. Assuming the cunent trend continues, in which wed< (at tte earliest) should the loading volume reach that level? Use the rounded answers, as required, from any previous part of this problem. Do not round any other intermediate calculations. Round your final answer to 2 decimal places.

It should reach 9S0loadings in Week

Worksheet Difficulty:2 Medium

probtem 3-T Learning Objective:03-11 Prepare a linear trend forecast.

2 5.00 ooints t).

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thousands

thousands

thousands

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Problem 3-2 National Scan, lnc., sells nadio frequency inventory tags. Monthly sales for a seven-month period were as follows:

Month Feb. Mar. Apr. May. Jun. Jul. Aug.

Sales (000)Units

15 16 11

26 15 u 26

b, Forecast September sales volume using each of the following:

(1) A linear trcnd equation.(Round your intermediate calculations and final answer lo 2 decimal places.)

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(2) A fiv+month moving average. (Round your answer to 2 decimal places.)

Moving average thousands

(3) Exponential smoothing with a smoothing constant equal to .20, assuming a March forecast of 17(000). (Round your intermediate forecast values and final answer to 2 decimal places)

Forecast

(4) The naive approach.

Naive approach

decimal places.)

Weighted average

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(5) A weighted average using .70 for August, .20 for July, and .10 for June. (Round your answer to 2

thousands

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