You would like to determine if teacher A gives different grades from teacher B in the same class at a significance level of 0.01. You take a random sample of 85 students from teacher A, 61 of whom passed the class. You also take a random sample of 70 students from teacher B, 56 of whom passed the class.

a) What is the estimate of the difference in proportion of students who pass? Find the estimate of pA − pB.

b) Is it appropriate to assume that the sampling distribution of the difference in proportions is normally distributed?

c) Find a 90% confidence interval for the difference in part (a) and interpret it.

d) Your original goal is to test to see if the two teachers are different. What are the hypotheses for this test?

e) Calculate the z-test statistic for the tests defined in part (d). f) Find the P-value for the test defined in part (d). g) State your conclusion for the hypothesis test, and then interpret the result in the context of the problem.

Consider the following relational schema:

student(studID, studname, major, advisor)

department(deptname, major)

club(studID,clubname)

professor(profID, profname, building, deptname)

NOTE: KEY ATTRIBUTES ARE IN BOLD

where advisor takes values in the domain of professor names (profname) and

the underline attributes form the primary key of the corresponding relations.

Questions:

1. State any assumptions you might make.
2. Write the relational algebra for the following queries:

2.a. Find all students and their advisors.

2.b. Find all the students who are in any one of the clubs that Jamie Smith is in.

2.c. Find all of the advisors, their buildings and departments that advise students that

are in the same clubs that Jamie Smith participates into.

2.d. Find all professors names and their departments that have offices in the

buildings identified in query 2c.

2.e. Find all student names and their major(s) that participate in Computer Science

Association Club.

Students in the senior capstone course (N = 36) at University Uptight took the Political Science subtest developed by the National Bored Testing Association. The test is a 75-item, multiple-choice test covering all areas of political science. The national norms for the test show a mean of 50. The mean for the students in the capstone was 55, with a standard deviation of 15. Did the students at UU score significantly higher than the national norms?

A.State your null and alternative hypotheses.

B.Is this a one- or two-tailed hypothesis? Explain.

C.Calculate the appropriate statistical test.

D.Can you reject the null hypothesis? Why or why not?

E.What is the probability of a Type I error? Type II error?

F.Write a Results section for your findings. Include the descriptive statistics, type of statistical test and results of the test, and effect size.

G.Write a Discussion section for your findings. Include the findings, interpretation/explanation/implication of the findings, and possible next studies.

Social psychology is best defined as the scientific study of Select one:

a. sociology

b. social influence

c. social norms

d. deviant social behavior

e. social mores

Students in a school building noticed a foul odor outside and a few began to speculate perhaps someone released a dangerous gas. Soon, the TV stations heard and began to report the story about a report of foul odors and complaints of symptoms were popping up everywhere. Many students complain of being ill for days after the event despite it being found the problem was merely a dead animal in a duct that was decaying. Physicians rule out any adverse effects from the odor and school administrators are unable to convince students to return to school. This phenomenon is better explained by Select one: a. mass delusions b. mass hysteria c. mass reactions d. mass reversions e. mass stupidity

1. Write the header and the implementation files (.h and .cpp separatelu) for a class called Course, and a simple program to test it, according to the following specifications:                   

1. Your class has 3 member data: an integer pointer that will be used to create a dynamic variable to represent the number of students, an integer pointer that will be used to create a dynamic array representing students’ ids, and a double pointer that will be used to create a dynamic array to represent the GPAs of each student.

2. Your class has the following member functions:

1. a constructor with an int parameter representing the number of students; the constructor creates the dynamic variable and sets it to the int parameter, creates the two dynamic arrays and sets everything to zero.

2. a function which reads in all the ids and the GPAs into the appropriate arrays.

3. a function called print_info which, for each student, does all of the

                following:

                It prints the student’s id and GPA. If the student’s GPA is greater than or equal to 3.8, it prints “an honor student”.

Price Discrimination

Promoters of a major college basketball tournament estimate that the demand for tickets on the part of adults is given by Q^A = 5,000 – 10P_A, and that demand for tickets on the part of students is given by Q^S = 10,000 – 100P_S. The promoters wish to segment the market and charge adults and students different prices. They estimate that the marginal and average total cost of seating an additional spectator is constant at $10 (i.e. there are no fixed costs).

1. If the promoters segment the market and charge adults and students different prices, what is the profit maximizing quantity that should be sold to each segment and what price should be charged for each segment? What is the total profit generated when the promoter segments the market?
2. Suppose the CEO of the tournament decides that price discrimination hurts the public image of the tournament and decides to charge everyone the same price. Calculate the profit maximizing number of tickets and the price of tickets when there is no price discrimination. What is the total profit generated when the promoter does not segment the market?

The argument in the following scenario was invalid. Discuss the logical fallacies that apply to the reasoning and why they matter in light of the scenario

You are engaged in an intense discussion with your friend, Bill, who works in the IT department at your university. Bill complains that many students are using P2P (peer-to-peer) file-sharing applications on the university’s network to download excessive amounts of unauthorized copyrighted material. He also claims that the most effective solution to this problem would be to disable student access to all (existing) P2P sites and to prevent students at your institution from setting up their own P2P sites for any reason whatsoever (even to include noncopyrighted material). You convey to Bill your belief that this measure is too drastic. However, Bill argues that the only way to eliminate unauthorized file sharing among students at your institution is to disable access to all P2P software on the university’s network.

Branching Program write a program to do the following: A university needs to compute the tuition of its students. They will ask for the name, the number of units the student is taking, and their residency status. R=resident , N = non- resident. The tuition to be computed as follows: non-resident students pay $100 per unit; resident students pay $50 per unit if they take 12 or units or more and $75 per unit if they take less than 12 units Users may enter upper or lower case letters (R/r or N/n) for residency. Error check the user input and output an appropriate message if the input is invalid. If the input is valid, determine the unit price, and calculate the tuition. Output student name, residency, status, number of units, part-time(<12 units) or full-time ( 12 and over units), the price per unit, and the total cost. Do not use loops.

Information Systems (IS) inevitably become bound up in organisational politics because they influence access to a key resource- namely, information. Information systems can affect who does what to whom, when, where, and how in an organisation. Many organisations require changes in personal, individual routines that can be painful for those involved and required retraining and additional effort that may or may not be compensated. Please note the following:

Discuss the major difficulties of ERP system implementation in USA.

Discuss the reasons behind user, and organizational resistance to ERP systems in USA.

The purpose of this assignment is to build up a better understanding of organizational resistance to change, and to examine theories, which support students’ analysis, findings and results. The students should be able to acquire in-depth understanding of CSFs, and their impact over IS project (e.g. Cloud ERP). This, therefore, encourages students to shape a holistic view of how IS impacts organization, management practices, and people.

Suppose you were attending a university where students hated the bookstore and their aggressively high prices. Suppose further that a student organization goes to the bookstore and argues that prices of text books are exceeding $150 per class. At such outrageous prices, students can no longer afford to go to school. The college bookstore claims that an average student pays $101.75 per class for texts (far below the stated claim of $150). A student group randomly selects ten courses from the catalog and finds the costs for each: $140, $125, $150, $124, $143, $170, $125, $94, $127, and $53.

a. Is that enough to justify a claim that the bookstore is underestimating the amount spent? Make sure that you show your work.

b. Students decide to take a sample from one more class and find that this class has a textbook cost of $195. Does adding this observation to the other 10 observations change your answer to part (a) above?