java

1.) a method to append a 2d double array at the right of another 2d double array, return a new array.

E.g. numss1: {{1, 2}, {3, 4, 5}, {6}}, numss2: {{7}, {8, 9}}, return {{1, 2, 7}, {3, 4, 5, 8, 9}, {6}}

Assume a project information is given in the table below:

1. What is the minimum number of activities that have to be delayed for the project to get delayed?

1. 1
2. 2
3. 3
4. 4
5. 5
6. None of the above (What is your answer?)

1. What is the minimum number of non-critical activities that have to be delayed for the project to get delayed?

1. 1
2. 2
3. 3
4. 4
5. 5
6. None of the above (What is your answer?)

1. What is the maximum number of activities that can be delayed for the project not to get delayed?

1. 1
2. 2
3. 3
4. 4
5. 5
6. None of the above (What is your answer?)

1. What is the maximum number of activities that can be delayed for the project not to have additional critical activities?

1. 1
2. 2
3. 3
4. 4
5. 5
6. None of the above (What is your answer?)

A -year study conducted by the American Heart Association provided data on how age, blood pressure, and smoking relate to the risk of strokes. Data from a portion of this study follow. Risk is interpreted as the probability (times 100) that a person will have a stroke over the next 10-year period. For the smoker variable, 1 indicates a smoker and 0 indicates a nonsmoker.

a. Develop an estimated regression equation that can be used to predict the risk of stroke given the age and blood pressure level. Enter negative value as negative number. Use Table 4 in Appendix B.

b. Consider adding two independent variables to the model developed in part (a), one for the interaction between age and blood pressure level and the other for whether the person is a smoker. Develop an estimated regression equation using these four independent variables. Enter negative value as negative number. Use Table 4 in Appendix B.

c. At a  level of significance, test to see whether the addition of the interaction term and the smoker variable contribute significantly to the estimated regression equation developed in part (a). Use Table 4 in Appendix B.

What is the value of the F test statistic?

(to 2 decimals)

P-value is - Select your answer -lower than 0.01between 0.01 and 0.025between 0.025 and 0.05between 0.05 and 0.10greater than 0.10Item 36 , so the addition of the two independent variables - Select your answer -is not is 37 statistically significant.

Write a C++ program to allow the user to:

1. Create two classes. Employee and Departments.
The Department class will have: DepartmentID, Departmentname, DepartmentHeadName.
The Employee class will have employeeID, emploeename, employeesalary, employeeage, employeeDepartmentID.

Both of the above classes should have appropriate constructors, accessor methods.

2. Create two arrays . One for Employee with the size 5 and another one for Department with the size 3.
Your program should display a menu for the user to do the following:

1. Create Department. Collect all information about a department. Make sure the department ID does not already exist in the array containing Department objects. If it does not, then insert the Department object into the array. When the array is full, display the error message to the user "The array is full, you can not add any more departments"

2. Create Employee. Collect all information about an Employee. Make sure the Employee ID does not already exist in the array containing Employee objects. If it does not, then insert the Employee object into the array. Also make sure that the DepartmentID that the employee belongs also exists. If it does not, then display error message.
When the array is full, display the error message to the user "The array is full, you can not add any more Employees"

3. Write the data to the file. When the user selects this option, dump the information in each array into a separate file.

4. Retrieve data from file. When user selects this option, open each file, load the data from the file into the appropriate array.

5. Display Report: When user selects this option, go through arrays and display the total salary paid for each department. The report should display the department name and the total salary of all employees in that department.

Test Case

TEST CASE1:

1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 1
Please Enter Department Details:
Department ID : 1
Department Name : Sales
Head of Department : Anna
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 1
Please Enter Department Details:
Department ID : 1
Value must be unique!
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 1
Please Enter Department Details:
Department ID : 2
Department Name : Marketing
Head of Department : Mark
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 1
Please Enter Department Details:
Department ID : 3
Department Name : GlobalSales           
Head of Department : Patil
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 1

The array is full, you can not add any more Departments.
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
Please Enter Employee Details:
Employee ID : 1
Employee Name :John
Salary: $45000
Age : 25
Department ID : 1
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
Please Enter Employee Details:
Employee ID : 1
Value must be unique!
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 1

The array is full, you can not add any more Departments.
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
Please Enter Employee Details:
Employee ID : 2
Employee Name :Susan
Salary: $45000
Age : 26
Department ID : 1
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
Please Enter Employee Details:
Employee ID : 3
Employee Name :Adam
Salary: $50000
Age : 24
Department ID : 2
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
Please Enter Employee Details:
Employee ID : 4
Employee Name :Manny
Salary: $60000
Age : 26
Department ID : 2
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
Please Enter Employee Details:
Employee ID : 5
Employee Name :Maria
Salary: $60000
Age : 23
Department ID : 9
Please enter a valid department ID: 3
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
The array is full, you can not add any more Employees.
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 5

Salary Report By Department

Dept         : Sales
Total Salary : $90000

Dept         : Marketing
Total Salary : $110000

Dept         : GlobalSales
Total Salary : $60000
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 9
Please enter a valid choice (1 - 6): 3
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 6
Thank you, goodbye.


TEST CASE 2:

1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 1
Please Enter Department Details:
Department ID : 1
Department Name : Sales
Head of Department : Markus
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 1
Please Enter Department Details:
Department ID : 1
Value must be unique!
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 1
Please Enter Department Details:
Department ID : 2
Department Name : Marketing
Head of Department : Anna
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
Please Enter Employee Details:
Employee ID : 1
Employee Name :John
Salary: $45000
Age : 23
Department ID : 1
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
Please Enter Employee Details:
Employee ID : 2    
Employee Name :Susan
Salary: $40000
Age : 45
Department ID : 1
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 2
Please Enter Employee Details:
Employee ID : 3
Employee Name :many
Salary: $70000
Age : 34
Department ID : 2
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 5

Salary Report By Department

Dept         : Sales
Total Salary : $85000

Dept         : Marketing
Total Salary : $70000
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 3
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 
4
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 5

Salary Report By Department

Dept         : Sales
Total Salary : $85000

Dept         : Marketing
Total Salary : $70000
1. Create Department
2. Create Employee
3. Write Out Data File
4. Read In Data File
5. Display Salary Report
6. -- Quit -- 
Please make a selection : 6
Thank you, goodbye.

. Consider a firm that has a production function y = f(x1, x2) = 2x ^1/4 1 x ^1/4 2 facing input prices w1 = 2 and w2 = 4. Assume that the output price p = 8.

• What will be the profit maximizing output level?
-What will be the profit? •
-If this firm is divided up into two equal-size smaller firms, what would happen to its overall profits? Why

An experiment was conducted to study growth characteristics of 8 different provenances (regions of natural occurrence) of Gmelina arborea (a tree native to southern Asia). There are three plots available for planting, so one tree of each provenance is planted in each plot. The response variable is the diameter of each tree (in centimeters) at breast height (1.4 meters above ground).

What type of design is being used in this experiment?

Perform the appropriate analysis to evaluate the differences in mean diameter at breast height of the eight provenances.

Which provenance(s), if any, has (have) largest mean diameter at breast height?

Comment on the effectiveness of the design in increasing the efficiency of the experiment.

Problem: Susan Sound predicts that students will learn most effectively with a constant background sound, as opposed to an unpredictable sound or no sound at all. She randomly divides twenty-four students into three groups of eight. All students study a passage of text for 30 minutes. Those in group 1 study with background sound at a constant volume in the background. Those in group 2 study with noise that changes volume periodically. Those in group 3 study with no sound at all. After studying, all students take a 10 point multiple choice test over the material. Their scores follow:
group test scores

1) constant sound 7 4 6 8 6 6 2 9
2) random sound 5 5 3 4 4 7 2 2
3) no sound 2 4 7 1 2 1 5 5

Please give me step by step how to answer the question.

House Prices:

Notes on variables:

Price: In thousands of dollars

Ac: air conditioner (1 if yes, 0 if no)

Size: In square feet

Age: In years

Pool: (1 if yes, 0 if no)

Bedrms: Number of Bedrooms

Baths: Number of Bathrooms

4)   a. Make a Scatter plot where x=size and y=price

       b. Calculate the Least Squares Regression (LSR) equation:

       c. Does the intercept make sense? Why or why not?

       c. Find and interpret the R²

d. Predict the average price of a home that is 1000 square feet.

e. Better interpretation of the slope: If the square footage increased by 40 square feet, then how more would you expect the house to cost?

f. Plot the residuals vs. X-values.

g. Use the residuals plot or the regression line to identify any outliers. (If there are any.)

5) Looking at Heights again. Remember women have a mean height m= 65 in. and a standard deviation s =2.5 in. and men have a mean height of m=70 and a standard deviation s= 3

       a. What proportion of women are taller than 69 in?

b. What height for men is the 65^th percentile (larger than 65% of the data)?

c. What proportion/percentage of men have height between 68 to 75?