Reducing scrap of 4-foot planks of hardwood is an important factor in reducing cost at a wood-flooring manufacturing company.Accordingly, engineers at Lumberworks are investigating a potential new cutting method involving lateral sawing that may reduce thescrap rate. To examine its viability, samples of 500 and 400 planks, respectively, were examined under the old and new methods.Sixty-five of the 500 planks were scrapped under the old method, whereas 35 of the 400 planks were scrapped under the newmethod. (You may find it useful to reference the appropriate table: z table or t table)a. Construct the 90% confidence interval for the difference between the population scrap rates between the old and new methods,respectively. Report the lower and the upper limits as proportions. (Negative value should be indicated by a minus sign. Round finalanswers to 2 decimal places.)Confidence interval isto

The question is about confidence interval Given : No. of sample of planks examined under old method…

Answered: Reducing scrap of 4-foot planks of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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2. To appeal to customers that are trying to cut calories, a company that sells orange juice decides to market a premium juice, "OJ 50", which has half as many calories as traditional orange juice. The ingredient listing reveals that OJ 50 consists of 50% water and 50% orange juice. Besides misleading customers to pay more for less orange juice, a consumer group believes that the product actually consists of greater than 50% water. To test this claim they select a random sample of 50 bottles of their 52-ounce OJ 50 and detemine the proportion of each that is water. They decide to use a=0.05. (a) State appropriate hypotheses for performing a significance test. (b) Describe what a Type I error would be in this context. (c) What is the probability of making a Type I eror when performing this test? (d) Describe what a Type II error would be in this context. (e) Which error (Type I or Type II) is more serious for the company that produces OJ 50? Explain.
8. An entrepreneur wanted to assess the quality of eggs produced by his subcontractors. He measured the weight (Y in g) of each egg in a selected pen as well as its circumference (X, in cm) to obtain the size. Define the population of the study.
A pharmacist bought a specific material from two different Providers. To compare the level of impurities present in the purchases made the two suppliers, the pharmacist measured the percentage of impurities present in each of the groups, obtaining the following: Supplier A: 1.8 2.5 1.5 1.2 1.0 Supplier B: 1.6 2.5 1.2 2.3 1.5 Which of the purchases has greater uniformity in impurities? Justify properly.
Assuming an M/M/1 system setup with a service rate of 25 entities per hour and an idling ratioof 4% Define the system’s birth rate. Define at least two ways of arriving at the number of entities in the system. Define the ratio of the time an entity spends waiting and the time the entity spends in thesystem?
This is a practice exam. I would like to know how to slove usign excel or megastat Wenton Powersports produces dune buggies. They have three assembly lines, “Razor,” “Blazer,” and “Tracer,” named after the particular dune buggy models produced on those lines. Each assembly line was originally designed using the same target production rate. However, over the years, various changes have been made to the lines. Accordingly, management wishes to determine whether the assembly lines are still operating at the same average hourly production rate. Production data (in dune buggies/hour) for the last eight hours are as follows. (You may find it useful to reference the F table.) Razor Blazer Tracer 11 10 9 10 8 9 8 11 10 10 9 9 9 11 8 9 10 7 12 11 8 12 8 9 Click here for the Excel Data File a. Specify the competing hypotheses to…
3) Two suppliers are bidding for a customer's business. Both are similar in cost, percentage of on-time deliveries, etc. The final decision will be based on which supplier provides the "best" quality. The process outputs for suppliers A and B are displayed below. Supplier A's process has half the variation as B's, but is centered halfway between the middle of the tolerance and the USL, with 0.1% above the USL. Supplier B, on the other hand, is centered exactly at the middle of the tolerance, with 0.1% of its output outside each of the two specifications. Other estimates: SD (A): 0.809 SD (B): 1.618 Supplier A 52.5 Supplier B Supplier A has 0.5% 0.5% defects 0.25% 0.25% Supplier B has 0.25 % defective both sides LSL-45 50 USL-56 Questions 3||3a) What is the Cp of Supplier A? 4||3b)What is the Cp of Supplier B? 5||3c) What is the Cpk of supplier A? 6||3d) What is the Cpk of Supplier b? 7||3e) Who should get the bid award? 8||3f) Per 1000 products, how many good products has Supplier A…
The operations manager for an appliance manufacturer wants to determine the optimal length of time for the washing cycle of a household clothes washer. An experiment is designed to measure the effect of detergent brand and washing cycle time on the amount of dirt removed from standard household laundry loads. Four brands of detergent (A,B,C,D) and four levels of washing cycles (18, 20, 22, and 24 minutes) are specifically selected for analysis. 32 standard household laundry loads (having equal weight and dirt) are randomly assigned to the 16 detergent-washing cycle time combinations. The results (in pounds of dirt removed) are: Washing Cycle Time (in Minutes) Brand 18 20 22 24 A 0.11 0.13 0.17 0.17 0.09 0.13 0.19 0.18 B 0.12 0.14 0.17 0.19 0.1 0.15 0.18 0.17 0.08 0.16 0.18 0.2 0.09 0.13 0.17 0.16 0.11 0.12 0.16 0.15 0.13 0.13 0.17 0.17 Perform a Two-way Analysis of Variance with Replication in Excel and output the ANOVA table assuming a 5% level of significance. Choose the correct…
A cellphone provider has the business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a substantially reduced cost. Data are collected from a random sample of 500 subscribers. The results indicate that 123 of the subscribers would upgrade to a new cellphone at a reduced cost. Reducing the price will be profitable if at least 20% of the subscribers would upgrade. Complete parts (a) and (b) below. a. At the 0.05 level of significance, is there evidence that more than 20% of the customers would upgrade to a new cellphone at a reduced cost? Determine the null hypothesis, Ho, and the alternative hypothesis, H₁ . ▶
In relation to an evaluation of a natural park you have collected data on the visitors, and obtaineddata for the travel costs and their zones of origin, i.e. basic data needed when applying the TravelCost Method.All visitors come by car and there’s only one person in each car. There are four different zones (Iclose, and IV most far away) and the total cost per person is given in the table below. Give a short explanation of the TCM. Would it be possible to do a reasonable TCM analysis from these data? Zone Travel cost per person($) Total population ineach zone Annual number ofvisitors from eachzone I 10 4000 400 II 15 3000 250 III 20 3500 410 IV 25 4000 450
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