Questions
101 students won iPhone. The winners listed in sorted order. How many iterations will it take...

101 students won iPhone. The winners listed in sorted order. How many iterations will it take for a binary search to find a particular name on the list, in the worst case?

In: Computer Science

A school newspaper reporter decides to randomly survey 17 students to see if they will attend...

A school newspaper reporter decides to randomly survey 17 students to see if they will attend Tet (Vietnamese New Year) festivities this year. Based on past years, she knows that 21% of students attend Tet festivities. We are interested in the number of students who will attend the festivities.

a. In words, define the Random Variable X.

b. List the values that X may take on.

c. Give the distribution of X.
X ~ ____ ( ____ , ____ )

d. How many of the 17 students do we expect to attend the festivities? (Round your answer to the nearest whole number.)   

e. Find the probability that at most 3 students will attend. (Round your answer to four decimal places.)

f.   Find the probability that more than 2 students will attend. (Round your answer to four decimal places.)

In: Statistics and Probability

Increased government spending will reduce long-run growth rate of real GDP if : a. the government...

Increased government spending will reduce long-run growth rate of real GDP if :

a. the government spending involves building dams and levees.

b. the private spending that is crowded out is investment spending.

c. the private spending that is crowded out is consumption spending.

d. the government spending involves increased spending on highways and bridges.

In: Economics

categories and examples based upon gerontographics the six different types of American generations the terms of...

categories and examples based upon gerontographics
the six different types of American generations
the terms of cohort analysis, subjective discretionary income, social stratification, and social status
the pros and cons with using single-item indexes and multi-item indexes
the social structure categories in the United States

In: Economics

Create a program in Java for storing the personal information of students and teachers of a...

Create a program in Java for storing the personal information of students and teachers of a school in a .csv (comma-separated values) file.

The program gets the personal information of individuals from the console and must store it in different rows of the output .csv file.

Input Format

User enters personal information of n students and teachers using the console in the following

format:

n

Position1 Name1 StudentID1 TeacherID1 Phone1

Position2 Name2 StudentID2 TeacherID2 Phone2

Position3 Name3 StudentID3 TeacherID3 Phone3

. . .

Positionn Namen StudentIDn TeacherIDn Phonen


Please note that the first line contains only an integer counting the number of lines

following the first line.

In each of the n given input lines,

  • Position must be one of the following three strings “student”, “teacher”, or “TA”.

  • Name must be a string of two words separated by a single comma only.

  • StudentID and TeacherID must be either “0” or a string of 5 digits. If Position is “teacher”, StudentID is zero, but TeacherID is not zero. If Position is “student”, TeacherID is zero, but StudentID is not zero. If Position is “TA”, neither StudentID nor TeacherID are zero.

  • Phone is a string of 10 digits.


If the user enters information in a way that is not consistent with the mentioned format,

your program must use exception handling techniques to gracefully handle the situation

by printing a message on the screen asking the user to partially/completely re-enter the

information that was previously entered in a wrong format.



Data Structure, Interface and Classes

Your program must have an interface called “CSVPrintable” containing the following three methods:

  • String getName ();

  • int getID ();

  • void csvPrintln ( PrintWriter out);

You need to have two classes called “Student” and “Teacher” implementing CSVPrintable

interface and another class called “TA” extending Student class. Both Student and Teacher classes must have appropriate variables to store Name and ID.

In order to store Phone, Student class must have a phone variable of type long that can store a 10-digit integer; while the Teacher class must have a phone variable of type int to store only the 4-digit postfix of the phone number.

Method getName has to be implemented by both Student and Teacher classes in the same way. Class Student must implement getID in a way that it returns the StudentID and ignores the TeacherID given by the input. Class Teacher must implement getID in a way that it returns the TeacherID and ignores the StudentID given by the input. Class TA must override the Student implementation of getID so that it returns the maximum value of StudentID and TeacherID.

Method csvPrintln has to be implemented by Student and Teacher classes (and overridden by TA class) so that it writes the following string followed by a new line on the output stream out:

getName() + “,” + getID() + “,” + phone



Output .csv File

The program must store the personal information of students, teachers and TAs in a commaseparated values (.csv) file called “out.csv”. You need to construct the output file by repetitively calling the csvPrintln method of every CSVPrintable object instantiated in your program. The output .csv file stores the information of every individual in a separate row; while each column of the file stores different type of information regarding the students and teachers (i.e. Name, ID and phone columns). Please note that you should be able to open the output file of your program using MS-Excel and view it as a table.

Sample Input/Output

Assume that the user enters the following four lines in console:

Teacher Alex,Martinez 0 98765 3053489999

Student Rose,Gonzales 56789 0 9876543210

TA John,Cruz 88888 99999 1234567890

The program must write the following content in the out.csv file.

Alex Martinez,98765,9999

Rose Gonzales,56789,9876543210

John Cruz,99999,1234567890

In: Computer Science

Individually identify what you consider to be the greatest achievements accomplished by mankind in the last...

Individually identify what you consider to be the greatest achievements accomplished by mankind in the last five decades. Now share your list with three to five other students in the class, and come up with an expanded list. Review these accomplishments in terms of the definition of a project. What does your review suggest about the importance of project management?

In: Operations Management

A point charge with a mass of 1.81 ng and a charge of +1.22 uC moves...

A point charge with a mass of 1.81 ng and a charge of +1.22 uC moves in the x-y plane with a velocity of 3.00 x 104 m/s in a direction 15° above the +x-axis. At time t=0, the point charge enters a uniform magnetic field of strength 1.25 T that points in the +x-direction. Assume that the point charge remains immersed in the uniform magnetic field after time t=0.

a. (5 points) What is the magnitude and direction of the magnetic force that the magnetic field exerts on the point charge at time t=0?

b. (5 points) How does the x-component of the charge’s initial velocity effect the motion of this point charge as it moves through the uniform magnetic field? Does its magnitude change? Does its direction change? Explain your reasoning.

c. (5 points) How does the y-component of the charge’s initial velocity effect the motion of this point charge as it moves through the uniform magnetic field? Does its magnitude change? Does its direction change? Explain your reasoning.

d. (5 points) Use your answers from parts 1b & 1c to explain why the path of this point charge is helical (corkscrew-shaped). Explain your reasoning.

e. (2.5 points) Determine the radius of the circular part of the point charge’s helical path.

In: Physics

Consider an economy with three people and two goods, one public (g) and one private (x)....

Consider an economy with three people and two goods, one public (g) and one private (x). The utility functions for the three people are UA = xA +20lng, UB = xB +30lng, and UC = xC +10lng. The marginal cost of g is constant at 10. According to the Samuelson condition, what is the socially efficient amount of the public good in this economy? Explain why the Samuelson condition picks out the efficient amount of a public good.

In: Economics

According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), and the National Institutes of...

According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), and the National Institutes of Health (NIH), 41% of college students nationwide engage in “binge drinking” behavior, having 5 or more drinks in one occasion during the past two weeks. A college president wonders if the proportion of students enrolled at her college that binge drink is actually different than the national proportion.


In a commissioned study, 348 students are selected randomly from a list of all students enrolled at the college. Of these, 118 admitted to having engaged in binge drinking.

  1. Identify the variable of interest – be specific. Then calculate the statistic and standard error for a CI for this sample.

In: Statistics and Probability

(Based on Alton Bridge Video Clip) Large construction projects, like buildings and bridges, are some of...

(Based on Alton Bridge Video Clip) Large construction projects, like buildings and bridges, are some of the most complex projects to manage. The construction of the bridge from

Alton, Ill. to St. Louis provides an excellent example of a complex project. Describe three challenges the Alton Bridge project had faced and how they were resolved?

In: Operations Management