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The average length of time customers spent on waiting at xyz store's check-out counter before a new P.O.S. system was installed was 5.1 minutes. A sample of 49 customers randomly selected at the check-out counter after the new P.O.S. system was installed showed that the average waiting time was 4.55 minutes with a sample standard deviation of 1.45 minutes. We wish to determine if there has been a significant decrease (from 5.1 minutes) in the average waiting time after the P.O.S. system was installed
1. State the null and alternative hypotheses to be tested.
2. Compute the test statistic.
3. Determine the critical value for this test at the 0.05 level of significance.
4. What do you conclude at the 0.05 level of significance?
5. Construct a 95% confidence interval for the average waiting time after the new P.O.S. system was installed.
Explain the differences between cyber crimes and computer crime
Consider a database system that includes an atomic increment operation, in addition to the read and write operations. Let V be the value of data item X.
The program should pass these values to a function that returns the future value of the account after the specified number of months. The program should display the accounts future value.
What types of ethical issues and information security issues are common in organizations? Is there a relationship between unethical acts of company leadership
Briefly describe direct, parallel, and phased deployments. What are the advantages and disadvantages of each deployment approach.
Discuss two main approaches to identify and reuse free memory area in a heap.
The policy should include the Do's and Don'ts of computer and internet use as well as penalties that could be applied if the policy is breached.
Two planes cut a right circular cylinder to form a wedge. One plane is perpendicular to the axis of the cylinder and the second makes an angle of θ degrees with the first. (Use r for the radius.)
What are the three classes of wireless data networking? List the main features of 3G systems and how these compare to 4G systems. Define IPWireless technology.
A TV channel has a bandwidth of 6 MHz. If we send a digital signal using one channel, what are the data rates if we use one harmonic, three harmonics, and five harmonics?
Especially for You Jewelers is a small jewelry company in a college town. Over the last couple of years, it has experienced a tremendous increase in its business. However, its financial performance has not kept pace with its growth. The current syste..
Butler University is bringing to life their virtual online educational program. They know that they have students, teachers, employees, buildings etc, however all of their data is stored via paper!. You are to take everything Butler has to offer and ..
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