1. A sociologist studied random samples of full-time employees in a particular occupation – six women and six men – to determine whether gender has an influence on the average (mean) number of hours worked per day. She obtained the following results:

           Women                Men  

                10                      12

                 9                        9

                 7                        8

                 4                       10

                 9                       11

                 6                        7     

Use a .01 alpha level to test whether there is a gender difference in the mean number of hours worked, and answer the following questions:

1. Is this a one-tailed or two tailed test? How do you know?
2. What is the critical value of the test statistic?
3. What is the obtained value of the test statistic?
4. What decision about the null hypothesis does your test lead to?
5. What does this indicate about gender differences in hours worked among the population working in this occupation?
6. Would your decision be different if you used an alpha level of .05? Explain.

A researcher decides to analyze the effects of nutrition on personality. He collects 7 pairs of identical twins and randomly assigns one twin from each pair to a controlled diet condition. The twins assigned to the other condition are allowed to eat whatever they please. The following are scores on a standardized personality inventory:

Personality inventory scores for twins in controlled diet condition:
10, 9, 4, 3, 8, 6, 7

Personality inventory scores for twins in eat-what-you-want condition:
16, 11, 9, 4, 5, 9, 12

NOTE: The order of the scores is important here. The first score in the controlled diet condition (10) should be paired with the first score from the other condition (16), etc.

Hint: This is a two-tailed test.

1. Null hypothesis:
2. Alternative hypothesis:
3. Statistical test (be specific!):
4. Significance level: alpha = .01
5. degrees of freedom:
6. Critical region (t-value):
7. Calculated t:
8. Decision:

You are a creating a portfolio of investments for a retiring person. The portfolio consists of ten securities. Three of them must be stocks, and seven of them must be bonds. You can choose among ten stocks, and twenty bonds. Answer the following-

1. If you randomly choose ten securities, what is the probability that the portfolio specification will be met, i.e., you would have three stocks and seven bonds in the portfolio?

2. Suppose that you are told that two stocks, GM and GE must be in the portfolio. Also, you are told that bonds of ATT and Verizon must be in the portfolio. These are already in the specified set of ten stocks and twenty bonds. How likely is it that a randomly formulated portfolio of ten securities will contain these stocks and bonds, and also satisfy the requirements for containing three stocks and seven bonds?

   (Note: the values in this problem are rather large to compute manually. You will be better off using Excel functions such as =permut or =combin for your analysis. If you do use them, write down the exact expressions you used as part of your analysis).

I have an issue this project

Background

The intensity of a hurricane is classified according to the Saffir-Simpson hurricane wind scale. The scale together with wind classifications of lower intensities is shown below:

Assignment

Write a Java program that asks the user to enter the wind speed. Use a series of nested if statements to determine the intensity of the storm using the above table. Output your result.

Validate your input to check for (invalid) negative wind speeds. For invalid wind speeds – output the classification: Invalid input.

Be sure to include a comment with your name, date, and a short description of the program.

Begin your program as follows:

import java.util.Scanner;

// TODO - add name, date, and purpose of program here
public class Main {

    public static Scanner input = new Scanner(System.in);

    public static void main(String[] args) {
       long speed;
       String classification;
        // TODO - write your program here
    }
}

Example Output

Enter wind speed (mph): 129

Classification: Category Three Hurricane

Additional Information

Do not include unnecessary if statements or unnecessary logical AND/OR clauses in your code.

My code

public class Main {

    public static Scanner input = new Scanner(System.in);

    public static void main(String[] args) {
        long speed;
        String classification;

        void classify(long speed){
            System.out.print("Categoty is");
            if (speed >= 0 && speed <= 38) {// cheking for category 1
                System.out.println("Not in scale");
            }
            else if (speed >= 39 && speed <= 73) {// cheking for category 2
                System.out.println("Topical storm");
            }
            else if (speed >= 74 && speed <= 95) {// cheking for category 3
                System.out.println("Category One Hurricane");
            }
            else if (speed >= 96 && speed <= 110) {// cheking for category 4
                System.out.println("Category Two Hurricane");
            }
            else if (speed >= 111 && speed <= 129) {// cheking for category 5
                System.out.println("Category Three Hurricane");
            }
            else if (speed >= 130 && speed <= 156) {// cheking for category 6
                System.out.println("Category Four Hurricane");
            }
            else if (speed >= 157 && speed <= more) {// cheking for category 7
                System.out.println("Category Five Hurricane");
            }

        }
    }
}

I have an issue this project

Background

The intensity of a hurricane is classified according to the Saffir-Simpson hurricane wind scale. The scale together with wind classifications of lower intensities is shown below:

Assignment

Write a Java program that asks the user to enter the wind speed. Use a series of nested if statements to determine the intensity of the storm using the above table. Output your result.

Validate your input to check for (invalid) negative wind speeds. For invalid wind speeds – output the classification: Invalid input.

Be sure to include a comment with your name, date, and a short description of the program.

Begin your program as follows:

import java.util.Scanner;

// TODO - add name, date, and purpose of program here
public class Main {

    public static Scanner input = new Scanner(System.in);

    public static void main(String[] args) {
       long speed;
       String classification;
        // TODO - write your program here
    }
}

Example Output

Enter wind speed (mph): 129

Classification: Category Three Hurricane

Additional Information

Do not include unnecessary if statements or unnecessary logical AND/OR clauses in your code.

should be written:

else if (speed <= 73) { // checking for category 2

My code

mport java.util.Scanner;
public class Main
{
public static Scanner input = new Scanner(System.in);
  
public static void main(String[] args) {
long speed;
String classification="";
System.out.println("Enter wind speed (mph): ");
speed= Main.input.nextLong();
if (speed >= 0 && speed <= 38) {// cheking for category 1
classification="Not in scale";
}
else if (speed >= 39 && speed <= 73) {// cheking for category 2
classification="Topical storm";
}
else if (speed >= 74 && speed <= 95) {// cheking for category 3
classification="Category One Hurricane";
}
else if (speed >= 96 && speed <= 110) {// cheking for category 4
classification="Category Two Hurricane";
}
else if (speed >= 111 && speed <= 129) {// cheking for category 5
classification="Category Three Hurricane";
}
else if (speed >= 130 && speed <= 156) {// cheking for category 6
classification="Category Four Hurricane";
}
else if (speed >= 157) {// cheking for category 7
classification="Category Five Hurricane";
}
if(speed>=0)
{
System.out.print("Category is "+classification);
}
else
{
System.out.println("Invalid input.");
}
}
}

Fran’s Convenience Marts is located throughout the Erie, Pennsylvania metro area. Fran, the owner, wants to expand her businesses to other communities in northwest Pennsylvania and southeast New York, such as Jamestown, Corry, Meadville, and Warren. To prepare your presentation to the local bank, you would like to better understand the factors that make a particular discount store productive. Fran must do all the work on her own, so she won't be able to study all the discount stores. Therefore, he selects a random sample of 15 stores and records the average daily sales, the floor space (area), the number of parking spaces and the average income of the families in the region for each of the stores. The sample information is reported below.

With the information above carry out the analysis required for the study that you must present to the bank regarding the best equation to estimate daily sales. Using all the information previously obtained by you:

a. indicate the correlation coefficients, identifying which is the best and the weakest among all the possible regressions and equations.
b. the regression errors obtained, identifying which is the best and the weakest among all the possible regressions and equations.
c. the required hypothesis tests
d.Present and identify which is the best equation to predict the monthly average purchase volume, explain why it is the best equation.
e.With the best estimated equation present the confidence interval to predict the monthly average purchase volume, when the Area of
the store is 585, the family income is 50,000 and the parking number is 10.

Only c and e (Important)

Fran’s Convenience Marts is located throughout the Erie, Pennsylvania metro area. Fran, the owner, wants to expand her businesses to other communities in northwest Pennsylvania and southeast New York, such as Jamestown, Corry, Meadville, and Warren. To prepare your presentation to the local bank, you would like to better understand the factors that make a particular discount store productive. Fran must do all the work on her own, so she won't be able to study all the discount stores. Therefore, he selects a random sample of 15 stores and records the average daily sales, the floor space (area), the number of parking spaces and the average income of the families in the region for each of the stores. The sample information is reported below.

With the information above carry out the analysis required for the study that you must present to the bank regarding the best equation to estimate daily sales. Using all the information previously obtained by you:

a. indicate the correlation coefficients, identifying which is the best and the weakest among all the possible regressions and equations.
b. the regression errors obtained, identifying which is the best and the weakest among all the possible regressions and equations.
c. the required hypothesis tests
d.Present and identify which is the best equation to predict the monthly average purchase volume, explain why it is the best equation.
e.With the best estimated equation present the confidence interval to predict the monthly average purchase volume, when the Area of
the store is 585, the family income is 50,000 and the parking number is 10.

You have worked as a staff auditor for two and one-half years and have mastered your job. You will likely be promoted to a senior position after this busy season. Your current senior was promoted about a year ago. He appreciates your competence and rarely interferes with you. As long as he can report good performance to his manager on things she wants, he is satisfied. The manager has been in her position for three years. She is focused on making sure audits run smoothly and is good at this. She is not as strong on the softer skills. Although she is approachable, her attention span can be short if what you are saying does not interest her. You are aware that she expects her teams to perform excellently during this busy season and she hopes to be promoted to senior manager as a result, bringing her closer to her goal of making partner early.

1. Determine the main potential ethical dilemmas. Next, use the seven (7) steps in the ethical decision-making framework to recommend one (1) course of action you would take in order to avoid the ethical dilemmas. Provide a rationale to support your recommendation.

2. based on your recommendation in Part I, suggest one (1) strategy that would support you making the right decision without undermining the manager’s confidence in your problem-solving ability in a difficult situation. Provide a rationale to support your response.

Suppose a natural gas distribution company has capital investments of $8 million and a capital cost r of 10%. The firm’s operating, billing, and maintenance costs are $200,000. The firm buys natural gas at the city gate price of $5/MCF to sell to its customers. The firm distributes gas to those customers through its existing pipeline network at close to zero marginal cost.

The firm faces the following (inverse) demand by customer type (recall that these are average demand per customer, so at any given price you have to multiply quantity by the number of customers to get total quantity demanded in that customer group):

Residential (10,000 customers): P = 50 − 5*q

Commercial (1,000 customers): P = 50 − q

Industrial (100 customers): P = 20 − 1/100 * q

Calculate the two-part tariff if the firm charges each customer the same two-part tariff and charges P = MC as the variable charge. What is the deadweight loss in this case?