QUESTION 2 (WORK MEASUREMENT: WORK SAMPLING) 10.35 A total of 300 observations of Bob Ramos, an assembly-line worker, were made over a 40-hour workweek. The sample also showed that Bob was busy working (assembling the parts) during 250 observations. a) Find the percentage of time Bob was working. b) If you want a confidence level of 95%, and if ±3% is an accept- able error, what size should the sample be? c) Was the sample size adequate? PX

QUESTION 2 (WORK MEASUREMENT: WORK SAMPLING) 10.35 A total of 300 observations of Bob Ramos, an assembly-line worker, were made over a 40-hour workweek. The sample also showed that Bob was busy working (assembling the parts) during 250 observations. a) Find the percentage of time Bob was working. b) If you want a confidence level of 95%, and if ±3% is an accept- able error, what size should the sample be? c) Was the sample size adequate? PX

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Instruction: Prepare a check sheet to analyze the data below from customer complaints, then prepare a list of recommendations that will address these complaints. Case: Tip Top Markets Tip Top Markets is a regional chain of supermarkets located in the southeastern United States. Karen Martin, manager of one of the stores, was disturbed by the large number of complaints from customers at her store, particularly on Tuesdays, so she obtained complaint records from the store’s customer service desk for the last nine Tuesdays. June 1 out of orange yogurt produce not fresh bread stale lemon yogurt past sell date checkout lines too long couldn’t find rice overcharged milk past sell date double charged stock clerk rude meat smelled strange cashier not friendly charged for item not purchased out of maple walnut ice cream couldn’t find the sponges something green in meat meat tasted strange didn’t like music store too cold…
Question 4: An HR director is analyzing reports from the past and the present to understand future staffing. Which model is being used by the HR director?a. Judgmental forecastsb. Simple linear regressionc. Multiple linear regressiond. Turnover analysis
QUESTION 6 In a burger shop, a sample of 36 days, was taken to study the daily sales, It was found that the mean daily sales are (m) with a standard deviation is (d). The confidence interval for the population mean is computed, the upper confidence limit is 35, and the lower confidence limit is 18 Calculate the value of m? (Round answer to two decimal places ex. 2.09)
Question 1 This Test: 60 pts possible Submit Test Daily high temperatures in St. Louis for the last week were as follows: 92, 92, 94, 94, 95, 88, 95 (yesterday). a) The high temperature for today using a 3-day moving average = degrees (round your response to one decimal place). b) The high temperature for today using a 2-day moving average = degrees (round your response to one decimal place). c) The mean absolute deviation based on a 2-day moving average = degrees (round your response to one decimal place). %3D d) The mean squared error for the 2-day moving average = degrees (round your response to one decimal place). e) The mean absolute percent error (MAPE) for the 2-day moving average = % (round your response to one decimal place).
Refer to Table S6.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. Ross Hopkins is attempting to monitor a filling process that has an overall average of 715 mL. The average range R is 6 mL. For a sample size of 10, the control limits for 3-sigma x chart are: Upper Control Limit (UCL;) = mL (round your response to three decimal places). Lower Control Limit (LCL-) = mL (round your response to three decimal places). The control limits for the 3-sigma R-chart are: Upper Control Limit (UCLR) = mL (round your response to three decimal places). Lower Control Limit (LCLR) = mL (round your response to three decimal places).
erations Management Spring21 Time left 1:09:19 stion In a fabric manufacturing factory, the quality control process using control charts from SPC. In an hour there are a total of 5 samples are taken each having 5 observations regarding the thickness of fabric in measured in millimeters. In a particular hour, the sample means (X-bar) are noted to be: 156.46, 199.62, 189.31, 102.22, and112.09 respectively. In the same sample, the corresponding ranges are: 11.97, 12.17, 13.94, 11.86, and 11.83 respectively. What are the lower and upper control limits for the X-bar chart? et ered ed out of O a. None is correct lag O b. 156.55, 170.47 tion O C. 144.77, 159.11 O d. 145.40, 190.72 O e. 143.55, 165.47 Of. 142.92, 160.66 Fi PREVIOUS PAGE NEXT PAGE O Type here to search %23
Question 32 A specification for bottle filling has an upper limit of 9.16 ounces and a lower limit of 9.12 ounces. The process is stabilized and centered at the specification mean, with a process width of 0.05 ounces. What is the process capability ratio? W F2 OA4 OB, 0.5 OC. 1.25 OD. 1 O.E. 2 OF, 0.8 #3 A Moving to another question will save this response. ㅁㅁ 13 E 4 DOD R F4 5 F5 MacBook Air V6 3) T T F6 Y & 7 ◄◄ F7 ► 11 8 F8 ( 9 F9 O F10 4) P Question 32 of 42 F11 B + € F12
13-2. (Pareto Chart & Fishbone Diagram). Smith, Schroeder, and Torn (SST) is a short-haul household furniture moving company. SST"s labor force, selected from the local community college football team, is temporary and part-time. SST is concerned with recent complaints, as tabulated on the following tally sheet. Complaint Broken glass Delivered to wrong address Furniture rubbed together while on truck Late delivery Late arrival for pickup ///// /// ///// ///// // ///// ///// Missing items Nicks and scratches from rough handling ///// Soiled Upholstery ///// ///// Tally ///// / /// ///// I // ///// ///// ///// /// a. Use a Pareto chart to identify the "few vital" complaint problems. b. Use a cause-and-effect diagram to identify potential causes of the complaints
Instruction: Prepare a check sheet to analyze the data below from customer complaints, then prepare a list of recommendations that will address these complaints. Case: Tip Top Markets Tip Top Markets is a regional chain of supermarkets located in the southeastern United States. Karen Martin, manager of one of the stores, was disturbed by the large number of complaints from customers at her store, particularly on Tuesdays, so she obtained complaint records from the store’s customer service desk for the last nine Tuesdays.
Four samples of three observations each have been taken. Sample 1: 12, 12.3, 11. Sample 2: 12, 12.4, 12. Sample 3: 12, 12, 11. Sample 4: 12, 11.8, 11. LCL and UCL of R-chart are: O a. None of them O b. O and 2.38 O c. -1 and 2.77 O d. Oand 2.12 O e. Oand 2.96
Day First-Floor Rooms (2 Painters) | | Basement Rooms | (1 Painter) | 1 2 | Bedrooms (1 Painter) | 3 | | 4 5 1 1 | 6 1 7 1 1 | 1 1 1 I 8 1 I Stairs & Hall (1 Painter) Bathroom 1 (1 Painter) 1 9 | | T 1 I I 1 1 1 I 10 11 12
20. A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly Chapter Ten Quality Control selected customers. SAMPLE 1 4. 4.5 4.6 4.5 4.7 4.2 4.5 4.6 4.6 4.2 4.4 4.4 4.8 4.3 4.7 4.4 4.5 4.3 4.3 4.6 4.9 a. Determine the mean of each sample. b. If the process parameters are unknown, estimate its mean and standard deviation. c. Estimate the mean and standard deviation of the sampling distribution. d. What would three-sigma control limits for the process be? What alpha risk would they provide? e. What alpha risk would control limits of 4.14 and 4.86 provide? f. Using limits of 4.14 and 4.86, are any sample means beyond the control limits? If so, which one(s)? g. Construct control limits? If so, which one(s)? ontrol charts for means and ranges using Table 10.3. Are any samples beyond the h. Explain why the control limits are different for means in parts d and g. i. If the process has a known mean of 4.4 and a known standard deviation of .18, what…