Data Mining Techniques
Please discuss whether or not the following problems are data mining tasks. Explain why.
(a). Retrieve students' records from a relational table with grade = "A". [5 points]
(b). From the table of students' information, check if attributes last name and address have any correlations. [5 points]
(c). Find all the documents from the text database containing keywords "data mining". [5 points]
(d). Divide the text database into several groups, each group containing near-duplicate or similar documents. [5 points]
(e). Based on historical stock data, as well as other attributes (e.g., gold price, gas price, etc.) for the past few days, predict the trend of a stock tomorrow. [5 points]
(f). Please provide your own example of the data mining. [5 points]
In: Computer Science
The rare earth element gadolinium is often used as a contrasting agent for MRIs. The concentration of gadolinium was measured in the discharge from a wastewater treatment plant near a large medical facility. Eight measurements were obtained: 1.212001.21200 ppm, 1.212001.21200 ppm, 1.209001.20900 ppm, 1.203001.20300 ppm, 1.777001.77700 ppm, 1.201001.20100 ppm, 1.218001.21800 ppm, 1.201001.20100 ppm.
Use the Grubbs test to determine if one of these values is an outlier. What is the value of ?calcGcalc?
?calc=Gcalc=
Should this potential outlier be rejected with 95% confidence? Critical values of ?G can be found in this table.
The potential outlier should be rejected.
The potential outlier should be kept.
Based on the outcome of the Grubbs test, calculate the mean (?¯x¯), standard deviation (?s), and 99% confidence interval for the results. A list of ?t values can be found in the Student's ?t table.
?¯=x¯=
ppm
?=s=
ppm
confidence interval:?¯±x¯±
ppm
In: Math
Pino Inc. is a BC based wine producer. In anticipation of a particularly bounteous grape harvest and a potential problem in obtaining a sufficient volume of shipping crates, Pino entered into a noncancellable agreement with Lumber Products Ltd. to supply 200,000 wooden crates at a price of $24 per crate plus 7% PST and 5% GST.
During the current fiscal year, Pino purchased 50,000 crates.
Near the end of the year, however, a restrictive tariff on the import of crates from the United States was lifted. Crates then became readily available from other suppliers for only $18 plus tax.
Required:
1. Prepare the journal entry to record the purchase of crates during the current fiscal year.
2. Prepare the journal entry to record the impact of the price drop. What conditions are necessary for Pino to recognize a loss on the contract?
In: Accounting
A proposed Ocean Thermal Energy Conversion (OTEC) plant draws heat from the ocean surface at 22°C and rejects heat to the water near the ocean bed at 4°C. What is the highest thermal efficiency the plant could achieve? [4] (b) Consider a system undergoing an adiabatic process from a fixed state 1 to a fixed state 2. Use the Second Law of Thermodynamics to prove that the maximum work is done by the system if the process is reversible. [6] (c) Steam at 20 MPa and 460°C flows at 12 kg/s into an adiabatic turbine and exits at 20 kPa. What is the maximum possible power output of the turbine? What is the temperature of the steam at the exit in that case? [5] (d) Steam at 20 MPa and 460°C flows at 12 kg/s into an adiabatic turbine and exits at 20 kPa and 85% quality. What is the isentropic efficiency of the turbine?
In: Mechanical Engineering
The top 10 strategic technology trends for 2017 are:
AI and Advanced Machine Learning. ...
Intelligent Apps. ...
Intelligent Things. ...
Virtual and Augmented Reality. ...
Digital Twin. ...
Blockchain and Distributed Ledgers. ...
Conversational System. ...
Mesh App and Service Architecture.
1.Have you seen one or more of these trends already impacting your workplace and if so what have you observed?
2.Identify a trend that you expect to impact your workplace in the near future and explain how you think it will impact your workplace.Identify a trend that you have experienced impacting you personally in your everyday life and explain what you have experienced.
3.Identify a trend that you expect to impact workplace training or higher education and explain how you believe it will be experienced in terms of performance and enrichment of the learning environment.
In: Operations Management
SUBJECT: HUMAN RESOURCE MANAGMENT//Complete Exercise #2 - page 430 of strategic compensation. Three firms are described briefly below. For each firm, identify the role (if any) that you believe indirect pay should play in the compensation system, and the specific benefits that it would make the most sense to offer. Explain why. a. A company offers lawn maintenance and yard cleanup services in the summer and snow removal services in the winter. It employs about 600 people at peak season (in summer) and has branches in major cities across the Prairies. b. A retail clothing chain offers personalized service and caters to upscale customers. It is located in major cities across Canada and employ's approximately 600 sales staff. c. A computer software firm develops customized software for various specialized applications for individual clients. Located near Ottawa, it employs about 1000 people.
In: Operations Management
A 0.25 kg block slides down a ramp that is 0.6 m tall, 0.8 m long and has a diagonal length of 1.0 m. The block starts at rest and arrives at the bottom with a speed of 1.3m/s. a.) How much heat was created by friction? b.)What is the average frictional force acting on the block? At what rate is kinetic energy being dissipated into heat near the bottom of the ramp? c.)Instead of a block, a cart with a mass of 0.33 kg rolls without any frictional losses. It collides with a horizontally mounted spring at the bottom of the ramp. If the spring has a spring constant of 215 N/m, how far will it be compressed. d.)Draw energy bar graphs for the following four moments: a. the moment of release, b. halfway down the ramp, c. at the base of the ramp d. when the spring has reached maximum compression.
In: Physics
A simple microscope consists of two lenses. The object is just placed outside of the focal length of an objective lens with f = 5.00 mm. The focal length of the eyepiece is f = 30.00 mm. The microscope is being used to image an object with a size of .30 mm.
A) What is the angular size of the object when observed with the naked eye at 0.30 m (assume this is greater than the near point of the observer). Give your answer in radians.
B) How far from the lens should the object be placed so that the image from the objective will be 0.40 m from the objective lens?
C) How far from this image should the eyepiece be placed so as to make a virtual image .30 m from the eyepiece lens?
D) What is the approximate overall magnitude of the linear magnification of the microscope?
E) What is the overall angular magnification?
In: Physics
Prepare a memo to management that explains how and why data analysis is used in the various stages of the audit process, including the risk assessment stage, the determination of sampling method and audit universe, the substantive procedures stage, and the end of the audit.
Specifically, the following critical elements must be addressed:
1. Data Analysis: Risk Assessment Stage: Explain how and why data analysis is used at the risk assessment stage of the audit process.
2. Data Analysis: Determination of sampling method and audit universe: Explain how data analysis is used in the determination of sampling method and audit universe.
3. Data Analysis: Substantive procedures stage: Explain how and why data analysis is used at the substantive procedures stage of the audit.
4. Data Analysis: End of audit: Explain how and why data analysis is used near the end of an audit.
In: Finance
Schedule of Cash Receipts
Rosita Flores owns Rosita's Mexican Restaurant in Tempe, Arizona. Rosita's is an affordable restaurant near campus and several hotels. Rosita accepts cash and checks. Checks are deposited immediately. The bank charges $0.60 per check; the amount per check averages $75. “Bad” checks that Rosita cannot collect make up 4 percent of check revenue.
During a typical month, Rosita's has sales of $49,000. About 80 percent are cash sales. Estimated sales for the next three months are as follows:
| April | $32,000 |
| May | 49,000 |
| June | 59,000 |
Required:
Prepare a schedule of cash receipts for May and June. Round your intermediate computations and final answers to the nearest whole dollar.
| Rosita's Mexican Restaurant | ||
| Schedule of Cash Receipts | ||
| For the Months of May and June | ||
| May | June | |
| Cash sales: | $ | $ |
| Checks | ||
| Total | $ | $ |
In: Accounting