The manager of a small store decided to make half of his employees complete a mandatory training program. Among other things, the training program teaches employees to better serve the customers, be more proactive, appropriately greet customers, etc. After completion of the training program, the manager asks the group that did not receive the training program (non-training group 1) to work for a week (week 1) and then asks the group that received the training program (training group) to work the next week (week 2). During week 1 and week 2 he collects data regarding customer satisfaction from 450 and 800 people respectively using the following item: How satisfied are you with our customers? Not satisfied at all Very Satisfied 1 2 3 4 5 6 7 For week 1 the average customer satisfaction was 4.5 and for week 2 the average customer satisfaction was 6. He found that the standard deviation of customer satisfaction before (standard deviation=1.5) and after the training program (standard deviation=2) from the website of the company that offers the training program (assume that these standard deviations are the population standard deviations) on the 7 points Likert scale mentioned above. If the manager is interested to see that if customer satisfaction increased due to the training program, what should be his null hypothesis. A. The customer satisfaction for the training group was at least as good as the non-training group B. The customer satisfaction for the non-training group was at least as good as the training group C. There is no difference of customer satisfaction across the training and the non-training group D. The customer satisfaction for the training group was better than the non-training group What is the appropriate test to use in the above scenario? A. two sample z-test B. one sample t-test C. two sample t-test D. one sample z-test What is the observed value of the test statistic? Report to 2 decimal places and only use numbers.
The manager of a small store decided to make half of his employees complete a mandatory training program. Among other things, the training program teaches employees to better serve the customers, be more proactive, appropriately greet customers, etc. After completion of the training program, the manager asks the group that did not receive the training program (non-training group 1) to work for a week (week 1) and then asks the group that received the training program (training group) to work the next week (week 2). During week 1 and week 2 he collects data regarding customer satisfaction from 450 and 800 people respectively using the following item:
How satisfied are you with our customers?
Not satisfied at all Very Satisfied
1 2 3 4 5 6 7
For week 1 the average customer satisfaction was 4.5 and for week 2 the average customer satisfaction was 6. He found that the standard deviation of customer satisfaction before (standard deviation=1.5) and after the training program (standard deviation=2) from the website of the company that offers the training program (assume that these standard deviations are the population standard deviations) on the 7 points Likert scale mentioned above.
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