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An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an...
Future Electronics makes compact disc players. Its research department found that the life of the laser...
Future Electronics makes compact disc players. Its research department found that the life of the laser beam device is normally distributed, with mean 4500 hours and standard deviation 460 hours. (a) Find the probability that the laser beam device will wear out in 5000 hours or less. (Round your answer to four decimal places.) (b) Future Electronics wants to place a guarantee on the players so that no more than 10% fail during the guarantee period. Because the laser pickup...
A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed...
A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed the length of the calls, in minutes, follows the normal probability distribution. The mean length of time per call was 4.00 minutes and the standard deviation was 0.40 minutes. a. What fraction of the calls last between 4.00 and 4.60 minutes? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.) Fraction of calls b. What fraction of the...
Attempt in Progress Incorrect A company randomly selected nine office employees and secretly monitored their computers...
Attempt in Progress Incorrect A company randomly selected nine office employees and secretly monitored their computers for one month. The times (in hours) spent by these employees using their computers for non-job-related activities (playing games, personal communications, etc.) during this month are given below. 7 8 9 8 11 4 14 1 6 Assuming that such times for all employees are normally distributed, make a 95% confidence interval for the corresponding population mean for all employees of this company. Round...
A study conducted by the research department of a pharmaceutical company claims that the annual spending...
A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief, py, is greater than or equal to the annual spending (per person) for non-prescription allergy relief medicine, uy. A health insurance company conducted an independent study and collected data from a random sample of 210 individuals for prescription allergy relief medicine. The sample mean is found to be 17.7 dollars/year, with a sample standard deviation of...
A retail store has implemented procedures aimed at reducing the number of bad checks cashed by...
A retail store has implemented procedures aimed at reducing the number of bad checks cashed by its cashiers. The store's goal is to cash no more than eight bad checks per week. The average number of bad checks cashed is 19 per week. Let x denote the number of bad checks cashed per week. Assuming that x has a Poisson distribution: (a) Find the probability that the store's cashiers will not cash any bad checks in a particular week. (Round...
Twenty-five percent of the employees of a large company are minorities. A random sample of 9...
Twenty-five percent of the employees of a large company are minorities. A random sample of 9 employees is selected. Round answers to the nearest thousandths (3 decimal places). What is the probability that the sample contains exactly 4 minorities? a. (1 point) What is the probability that the sample contains fewer than 2 minorities? b. (1 point) What is the probability that the sample contains exactly 3 non-minorities? C. (1 point) What is the expected number of minorities in the...
A company finds that one out of four employees will be late to work on a given day. If this compa...
A company finds that one out of four employees will be late to work on a given day. If this company has 41 employees, find the probabilities that the following number of people will get to work on time. (Round your answers to 4 decimal places.) (a) Exactly 31 workers or exactly 35 workers. (b) At least 26 workers but fewer than 34 workers. (c) More than 24 workers but at most 36 workers. We were unable to transcribe this...
Pasquist Water Company (PWC) operates a 24-hour facility designed to efficiently fill water-hauli...
Pasquist Water Company (PWC) operates a 24-hour facility designed to efficiently fill water-hauling tanker trucks. Trucks arrive randomly to the facility and wait in line to access a wellhead pump. Since trucks vary in size and the filling operation is manually performed by the truck driver, the time to fill a truck is also random. a. If the manager of PWC uses the "multiple-server model" to calculate the operating characteristics of the facility's waiting line, list three assumptions she must...
Current Attempt in Progress The Polishing Department of Major Company has the followine production and manufacturing...
Current Attempt in Progress The Polishing Department of Major Company has the followine production and manufacturing cost data for September. Materials are entered at the beginning of the process. Production: Beginning inventory 1,800 units that are 100% complete as to materials and 30% complete as to conversion costs; units started during the period are 43,600; ending inventory of 5,600 units 10% complete as to conversion costs. Manufacturing costs: Beginning inventory costs, comprised of $21.500 of materials and $33.186 of conversion...
Show Me How Calculator Service Department Charges The centralized computer technology department of Hardy Company has...
Show Me How Calculator Service Department Charges The centralized computer technology department of Hardy Company has expenses of $378,000. The department 18,000 hours of service for the period. The Retail Division has used 7,200 hours of computer technology service during the period, and the Commercial Division has used 10,800 hours of computer technology service has provided a total of How much should each division be charged for computer technology department services? Do not round interim calculations. Retail Division Commercial Division...
A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed the length of the calls, in minutes, follows the normal probability distribution. The mean length of time per call was 4.00 minutes and the standard deviation was 0.40 minutes. a. What fraction of the calls last between 4.00 and 4.60 minutes? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.) Fraction of calls b. What fraction of the...
Attempt in Progress Incorrect A company randomly selected nine office employees and secretly monitored their computers for one month. The times (in hours) spent by these employees using their computers for non-job-related activities (playing games, personal communications, etc.) during this month are given below. 7 8 9 8 11 4 14 1 6 Assuming that such times for all employees are normally distributed, make a 95% confidence interval for the corresponding population mean for all employees of this company. Round...
A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief, py, is greater than or equal to the annual spending (per person) for non-prescription allergy relief medicine, uy. A health insurance company conducted an independent study and collected data from a random sample of 210 individuals for prescription allergy relief medicine. The sample mean is found to be 17.7 dollars/year, with a sample standard deviation of...
Twenty-five percent of the employees of a large company are minorities. A random sample of 9 employees is selected. Round answers to the nearest thousandths (3 decimal places). What is the probability that the sample contains exactly 4 minorities? a. (1 point) What is the probability that the sample contains fewer than 2 minorities? b. (1 point) What is the probability that the sample contains exactly 3 non-minorities? C. (1 point) What is the expected number of minorities in the...
A company finds that one out of four employees will be late to work on a given day. If this company has 41 employees, find the probabilities that the following number of people will get to work on time. (Round your answers to 4 decimal places.) (a) Exactly 31 workers or exactly 35 workers. (b) At least 26 workers but fewer than 34 workers. (c) More than 24 workers but at most 36 workers. We were unable to transcribe this...
Pasquist Water Company (PWC) operates a 24-hour facility designed to efficiently fill water-hauling tanker trucks. Trucks arrive randomly to the facility and wait in line to access a wellhead pump. Since trucks vary in size and the filling operation is manually performed by the truck driver, the time to fill a truck is also random. a. If the manager of PWC uses the "multiple-server model" to calculate the operating characteristics of the facility's waiting line, list three assumptions she must...
Current Attempt in Progress The Polishing Department of Major Company has the followine production and manufacturing cost data for September. Materials are entered at the beginning of the process. Production: Beginning inventory 1,800 units that are 100% complete as to materials and 30% complete as to conversion costs; units started during the period are 43,600; ending inventory of 5,600 units 10% complete as to conversion costs. Manufacturing costs: Beginning inventory costs, comprised of $21.500 of materials and $33.186 of conversion...
Show Me How Calculator Service Department Charges The centralized computer technology department of Hardy Company has expenses of $378,000. The department 18,000 hours of service for the period. The Retail Division has used 7,200 hours of computer technology service during the period, and the Commercial Division has used 10,800 hours of computer technology service has provided a total of How much should each division be charged for computer technology department services? Do not round interim calculations. Retail Division Commercial Division...
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