Economic Order Quantity and Significant Predictor.

1. Stock prices over a period of fifty (50) years would roughly(prenominal) apt(predicate) exhibit no cyclical component. a. True b. sour 2. On the plot labeled a, which of the following is correct? a. There is a trend present. b. There is a analog relationship. c. There is an open outlier. d. There is a negative relationship. 3. On the plot labeled b, there is an outlier present. a. True b. False 4. On the plot labeled c, which of the following prototypes is most appropriate? a. single-parameter exponential smoothing b. reverse c. regression with seasonality (classical time-series) . no(prenominal) of the above argon appropriate 5. In a simple linear regression, we are exploitation monthly advertising expenditures (in $000) to auspicate monthly profits (in $000). If the least squares equation is y = 21. 5 . 1x and the coefficient of decision is . 49, the coefficient of correlation coefficient = ______. a. 0. 70 b. -0. 70 c. unable to be determined from the data. 6. In a simple linear regression, we are exploitation monthly advertising expenditures (in $000) to predict monthly profits (in $000). If the least squares equation is y = 21. 5 . x and the coefficient of determination is . 49. The predicted profit = __________ when advertising expenses are $0. a. 21. 5 b. -0. 1 c. $21,500 d. none of the above. 7. If the correlation coefficient is zero, there is no relationship between x and y. a. True b. False 8. Kelvin Shoe Stores carries a radical black dress shoe for men that sells at a rate of 500 distributively quarter. Their stream policy is to localise 500 per quarter, with a fixed address of $30/order. The annual reading cost is 20% of the cost of items held. The following cost structure is applicable Order Quantity value/ straddle 0-99 $36 100-199 32 200-299 30 300+ 28 For a price of $36, the optimal order sum of money is a. 129 b. infeasible for this cost structure. c. neither of the above. d. both a and b. 9. Kelvin Shoe Stores carries a rudimentary black dress shoe for men that sells at a rate of 500 each quarter.Their current policy is to order 500 per quarter, with a fixed cost of $30/order. The annual holding cost is 20% of the cost of items held. The following cost structure is applicable Order Quantity Price/pair 0-99 $36 100-199 32 200-299 30 300+ 28 The optimal order quantity is a. 129 b. 141 c. 146 d. 300 10. treasure Inc. arries special holiday items, including Happy Angels (HAs). During the season, the demand for HAs is approximately unremarkably distributed, with a mean of 320 and a modular deviation of 30. It costs Foster $5. 00 for each HA unless he orders at least 400, at which the price drops to $4. 50/HA. The HAs retail price is $10. Unsold items will be given to a local hospital, with a disposal cost of $0. 05/HA. Mr. Foster estimates that the goodwill cost of each item short is close to $0. 25. a. This is a single-period inventory problem. b. This is an EOQ problem. c. This is a periodic-review problem. d. None of the above 11.Foster Inc. carries special holiday items, including Happy Angels (HAs). During the season, the demand for HAs is approximately normally distributed, with a mean of 320 and a standard deviation of 30. It costs Foster $5. 00 for each HA unless he orders at least 400, at which the price drops to $4. 50/HA. The HAs retail price is $10. Unsold items will be given to a local hospital, with a disposal cost of $0. 05/HA. Mr. Foster estimates that the goodwill cost of each item short is close to $0. 25. A Christmas-tree form is appropriate. a. True b. False 12. A regular EOQ imitate is appropriate when demand is seasonal. a. True . False 13. See the attached Regression Data I. We are using the crook of radios, TVs, and DVD players stocked to predict the profit, revenue, and cost for future periods. First, run a model to predict the profit. Select all which apply. a. Radios is a significant predictor. b. TVs is a significant predictor. c. DVDs is a significant predictor. d. The overall model is significant. e. The intercept is positive. f. Severe multicollinearity is present. 14. See the attached Regression Data I. We are using the number of radios, TVs, and DVD players stocked to predict the profit, revenue, and cost for future periods.Next, run a model to predict the cost. Select all which apply. a. Radios is a significant predictor. b. TVs is a significant predictor. c. DVDs is a significant predictor. d. The overall model is significant. e. The intercept is positive. f. Severe multicollinearity is present. 15. See the attached Regression Data I. We are using the number of radios, TVs, and DVD players stocked to predict the profit, revenue, and cost for future periods. Based on the output, which of the following recommendations would be most appropriate? a. We should stock more radios. b.We should stock fewer TVs. c. We should increase floor space, since it is probably constraining our gross revenue ability. d. W e should consider the time period. 16. What is the best answer given this information? (3) molding 1 Model 2 Model 3 X-variables 6 4 3 R2 . 9344 . 8857 . 761 Adjusted R2 . 9058 . 8372 . 8497 MSE 5667. 53 6044. 05 5844. 78 a. Model 1 performs the best in all areas. b. Model 2 performs better than Model 3. c. We would most likely elect Model 1. d. We would most likely prefer Model 2. e. We would most likely prefer Model 3. 17. The plug-in below features three promise models practice sessiond on the same set of data. Select all that apply. Model 1 Model 2 Model 3 Type Single-parameter Exponential 2-parameter Exponential smoothing 3-parameter Exponential smoothing smoothing MSE 8755. 3 4876. 2 5945. 8 a. There is likely a strong seasonal component present. b. There is likely a trend present. c. There is no random component present. d.There is a cyclical component present. e. A different smoothing constant could affect the MSE for Model 1. 18. If we increase the order (s etup) cost, the order quantity will _____________ if we hold all other costs constant. a. increase b. decrease c. remain the same as long as there is no shortage cost d. become unstable 19. If demand is normally distributed, a. a basic EOQ is appropriate. b. a single-period model could not be appropriate. c. we should produce to fill demand, rather than filling it through orders. d. none of the above would be true. 20. Which of the following methods may be used to determine future order quantities? . anticipate b. regression c. inventory models d. all of the above 21. Refer to the inventory output for Betsys Blue lens hood Bakery. Here, Betsy is trying to determine the optimal order policy for birthday kits. What is the safety stock? 114____________ 22. Refer to 21. What is Betsys service level if she uses this policy? 87%________________ 23. Refer to 21. If Betsy changes to a lost sales model, the order quantity would be expected to increase. a. True b. False c. It depends on the cost associated with a lost sale. 24. Refer to the pointing output for Betsys. This model is appropriate for the type of data. . True b. False 25. Refer to 24. Look at the forecast errors. Which of the following best describes the situation? a. The errors are apocalyptical of what we like to see. b. The errors are randomly distributed. c. The errors are indicative of a problem with the model. d. The errors are indicative of a poor choice of ?. 26. Refer to 24. What recommendation would you rent? a. We should use the model as is. b. We should alter model parameters to improve the fit? c. We should use the model, but use extreme caution in doing so. d. We should eliminate some time periods for forecasting. Regression Data I meshwork Revenue Radios TVs DVDs Quarter Errors 6318. 96 8395. 1 36 65 48 4721. 57 6300. 28 26 48 39 5049. 16 6747. 5 33 51 40 2000 3 32 5249. 44 7028. 6 29 53 45 4 46 5290. 08 7116. 1 32 52 49 2001 1 19 5924. 41 7951. 0 41 58 52 2 23 5251. 97 7031. 09 36 52 44 3 34 4805. 72 6462. 8 31 47 44 4 49 5278. 60 7162. 2 46 49 51 2002 1 22 5301. 77 7136. 5 43 51 46 2 20 6121. 98 8249. 4 45 59 56 3 31 5416. 63 7244. 79 29 55 46 4 51 6552. 89 8718. 1 43 67 48 2003 1 16 6352. 93 8494. 2 46 63 51 2 26 6693. 01 8881. 5 55 68 43 3 37 5761. 97 7669. 0 48 58 39 4 48 5419. 50 7265. 38 33 54 47 2004 -1 22 5474. 64 7302. 7 35 55 44 2 24 4650. 87 6335. 9 41 42 49 4781. 91 6438. 3 48 45 39 MULTI-PERIOD EOQ MODEL (Backordering) NORMAL LEAD-TIME DEMAND PROBLEM Betsys Blue Bonnet Bakery Parameter Values smashed of Demand Distribution mu = 1,000 Stand. Deviation of Demand Distribution sigma = 100 Fixed Cost per Order k = 5,000 Annual Demand Rate A = 52,000 Unit Cost of Procuring an Item c 42. 00 = Annual retentivity Cost per Dollar Value h = 0. 20 Shortage Cost per Unit pS = 10. 0 Optimal Values Optimal Order Quantity Q* = 7,919 Optimal Reor der Point r* = 1,114 pass judgment Demand mu = 1,000 Total Expected Cost TEC(Q*) = $ 67,471. 4 Expected Shortages B(r*) = 6. 47 Probability of Shortage PDr* 0. 13 = Betsys Blue Bonnet Bakery ? = 0. 3 ? = 0. 5 ? = 0. Actual Trend Slope seasonal Forecast Error Quarter t Sales, Yt Tt bt St Ft 2003 W 1 36,500 1988 S 2 43,750 36,500. 00 7,250. 00 1. 20 1988 S 3 59,920 48,601. 00 9,675. 50 1. 23 1988 F 4 87,440 67,025. 55 14,050. 03 1. 0 2004 W 5 102,240 87,424. 90 17,224. 69 1. 17 1988 S 6 123,420 104,144. 98 16,972. 38 1. 19 125,436. 15 (2,016. 15) 1988 S 7 139,610 118,753. 37 15,790. 39 1. 19 149,325. 16 (9,715. 16) 1988 F 8 135,380 125,312. 56 11,174. 79 1. 13 175,522. 72 (40,142. 72) 2005 W 9 129,470 128,753. 89 7,308. 06 1. 04 159,616. 61 (30,146. 1) 1988 S 10 137,570 129,989. 43 4,271. 80 1. 08 161,612. 88 (24,042. 88) 1988 S 11 156,630 133,566. 44 3,924. 41 1. 18 159, 379. 23 (2,749. 23) 1988 F 12 150,980 136,498. 26 3,428. 11 1. 11 154,702. 82 (3,722. 82) 2006 W 13 143,340 139,362. 57 3,146. 21 1. 03 145,291. 38 (1,951. 38) 1988 S 14 153,360 142,190. 68 2,987. 16 1. 08 154,509. 63 (1,149. 3) 1988 S 15 169,730 144,939. 30 2,867. 89 1. 17 170,664. 76 (934. 76) 1988 F 16 161,990 147,249. 54 2,589. 07 1. 10 164,053. 12 (2,063. 12) 2007 W 17 154,760 149,940. 86 2,640. 19 1. 03 154,408. 75 351. 25 1988 S 18 164,780 152,592. 38 2,645. 85 1. 08 164,739. 26 40. 74 1988 S 19 186,730 156,466. 79 3,260. 13 1. 19 181,930. 65 4,799. 5 1988 F 20 177,880 160,230. 59 3,511. 97 1. 11 176,029. 75 1,850. 25 2008 W 21 170,360 164,152. 06 3,716. 72 1. 04 168,951. 59 1,408. 41 1988 S 22 178,830 167,190. 82 3,377. 74 1. 07 181,270. 26 (2,440. 26) 1988 S 23 195,550 168,732. 72 2,459. 82 1. 16 202,826. 81 (7,276. 81) 1988 F 24 187,220 170,501. 72 2,114. 41 1. 10 189,772. 64 (2,552. 4) 2009 W 25 163,230 168,070. 53 (158. 39) 0. 98 178,936. 82 (15,706. 82) 1988 S 26 162,890 163,137. 87 (2,545. 53) 1. 01 179,944. 64 (17,054. 64) 1988 S 27 174,540 157,361. 67 (4,160. 86) 1. 12 187,085. 45 (12,545. 45) 1988 F 28 163,130 151,724. 53 (4,899. 00) 1. 08 168,543. 79 (5,413. 79) 2010 W 29 144,517. 6 1988 S 30 143,788. 09 1988 S 31 153,515. 48 1988 F 32 142,720. 95 MSE = 175,943,211