The ABC Corporation wants to test for a difference in two methods of training new employees....
The ABC Corporation wants to test for a difference in two methods of training new employees. A sample of 15 new employees is given a three-day seminar (Method A) and a second sample of 12 new employees is given a two-day videocassette course (Method B). Each group is tested at the end of training and the results are: for Method A, the mean is 47.73 and the standard deviation is 4.42, foe Method B, the mean is 56.5 and the standard deviation is 4.27. At a 5% level of significance, can the company assume that there is No difference in the 2 methods of training? What is your conclusion?
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The ABC Corporation wants to test for a difference in two
methods of training new employees....
of training was suggested, and a test was conducted to compare the new method nine new...
of training was suggested, and a test was conducted to compare the new method nine new employees each were trained for a period of 3 weeks, Q3. A new method with the standard procedure. Two groups of one group using the new method and the other following the standard training procedure. The length of time (in minutes) required for each employee to assemble the device was recorded at the 3-week period. Average assembly time for the employees trained under standard...
In a study of annual salaries of employees, random samples were selected from two companies to...
In a study of annual salaries of employees, random samples were selected from two companies to test if there is a difference in average salaries. For Company "X", the sample was size 65, the sample mean was $47,000 and the population standard deviation is assumed to be $11,000. For Company "Y", the sample size was 55, the sample mean was $44,000 and the population standard deviation is assumed to be $10,000. Test for a difference in average salaries at a...
Question 5 [6 marks] Medics Records, a data-entry corporation is experimenting with a new user interface...
Question 5 [6 marks] Medics Records, a data-entry corporation is experimenting with a new user interface for their employees to use for coding medical records. They randomly selected 42 employees and recorded the number of records they entered per day under the old interface. The same employees were given a month to try the new interface and then recorded the number of records they entered per day under the new interface. The table below summarizes the result: Old Interface New...
The days of training a new employee needs are normally distributed with a population standard deviation...
The days of training a new employee needs are normally distributed with a population standard deviation of 3 days and an unknown population mean. If a random sample of 23 new employees is taken and results in a sample mean of 18 days, use Excel to find a 90% confidence interval for the population mean. Round the final answer to two decimal places.
Using traditional methods, it takes 11.2 hours to receive a basic flying license. A new license training method using Co...
Using traditional methods, it takes 11.2 hours to receive a basic flying license. A new license training method using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique with 16 students and observed that they had a mean of 11.4 hours with a standard deviation of 1.6. A level of significance of 0.10 will be used to determine if the technique performs differently than the traditional method. Assume the population distribution is approximately normal. Find the value...
Question 2 (a)() All of the employees of a company have been given training on a new regulatory regime. Twenty employees selected at random are tested on their knowledge of this topic. The sample ave...
Question 2 (a)() All of the employees of a company have been given training on a new regulatory regime. Twenty employees selected at random are tested on their knowledge of this topic. The sample average score for these twenty employees is 36.6 and the sample standard deviation is 24.9 All of the employees will be given a similar test. Assuming that the scores are normally distributed, find a 95% confidence interval for the average score of all the company's employees...
38. In a physics experiment, two different methods were used to measure the angle of deflection w...
38. In a physics experiment, two different methods were used to measure the angle of deflection when a subatomic particle collides with a certain material. Ten specimens of the material were used to compare the two methods, For each specimen, the angle of deflection was measured using both methods. For each specimen, the method used first was determined by the flip of a fair coin. The difference between the measured angles was calculated for each specimen. A test of the...
ABC Corporation is considering installing a new assembly procedure. Seven employees of the corporation are randomly...
ABC Corporation is considering installing a new assembly procedure. Seven employees of the corporation are randomly selected and the times taken by them to assemble one unit of the product using the existing procedure are recorded. They’re also asked to assemble one unit of the product using the new procedure. The assembly times (in minutes) for these seven selected employees for each procedure are listed in the following table. The production manager of the corporation would like to test whether...
Suppose Diana, an educational researcher at a local university, wants to test the impact of a...
Suppose Diana, an educational researcher at a local university, wants to test the impact of a new Spanish course that integrates cultural-immersion teaching techniques with standard teaching practices. She selects a simple random sample of 72 freshmen and divides them into 36 pairs, matched on IQ and high school GPA. She randomly selects one member of each pair to take the new course, while the other member in the pair takes the traditional course. Next, Diana records the course grade,...
Suppose that the training director of a manufacturing company wanted to compare three different team-based approaches...
Suppose that the training director of a manufacturing company wanted to compare three different team-based approaches (A, B, C). Each member of a group of 26 new employees was randomly assigned to one of three team-based methods. After completing training, the employees in the study were evaluated on the time it took (in minutes) to assemble the product. The results are summarized as follows Time To Assemble Product Methods B A C 8.82 8.21 8.57 9.26 6.65 8.50 8.70 7.44...
of training was suggested, and a test was conducted to compare the new method nine new employees each were trained for a period of 3 weeks, Q3. A new method with the standard procedure. Two groups of one group using the new method and the other following the standard training procedure. The length of time (in minutes) required for each employee to assemble the device was recorded at the 3-week period. Average assembly time for the employees trained under standard...
Question 5 [6 marks] Medics Records, a data-entry corporation is experimenting with a new user interface for their employees to use for coding medical records. They randomly selected 42 employees and recorded the number of records they entered per day under the old interface. The same employees were given a month to try the new interface and then recorded the number of records they entered per day under the new interface. The table below summarizes the result: Old Interface New...
Question 2 (a)() All of the employees of a company have been given training on a new regulatory regime. Twenty employees selected at random are tested on their knowledge of this topic. The sample average score for these twenty employees is 36.6 and the sample standard deviation is 24.9 All of the employees will be given a similar test. Assuming that the scores are normally distributed, find a 95% confidence interval for the average score of all the company's employees...
38. In a physics experiment, two different methods were used to measure the angle of deflection when a subatomic particle collides with a certain material. Ten specimens of the material were used to compare the two methods, For each specimen, the angle of deflection was measured using both methods. For each specimen, the method used first was determined by the flip of a fair coin. The difference between the measured angles was calculated for each specimen. A test of the...
Suppose Diana, an educational researcher at a local university, wants to test the impact of a new Spanish course that integrates cultural-immersion teaching techniques with standard teaching practices. She selects a simple random sample of 72 freshmen and divides them into 36 pairs, matched on IQ and high school GPA. She randomly selects one member of each pair to take the new course, while the other member in the pair takes the traditional course. Next, Diana records the course grade,...
Suppose that the training director of a manufacturing company wanted to compare three different team-based approaches (A, B, C). Each member of a group of 26 new employees was randomly assigned to one of three team-based methods. After completing training, the employees in the study were evaluated on the time it took (in minutes) to assemble the product. The results are summarized as follows Time To Assemble Product Methods B A C 8.82 8.21 8.57 9.26 6.65 8.50 8.70 7.44...
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