The questions in this assessment use the following.

      class R { ... }
      class A extends R { ... }
      abstract class B extends R { ... }
      final class C extends R { ...}
      class D extends A { ... }
      class E extends B { ... }
      class F extends B { ... }
      // none of the classes implement a toString() method

[0] Draw a class hierarchy for the classes defined above.

[1] No or Yes:  class R extends Object

[2] class G extends C   does not compile. Why?

[3] class G extends E, F   does not compile. Why?

[4] B doh = new B();   does not compile. Why?

[5] System.out.println(new R());   prints: R@6bc7c054   Why?

[6] No or Yes:  class D can have subclasses (children).

[7] If  public String toString() { return "Arizona"; }  
    is added to class A, then System.out.println(new D()); 
    prints what?

[8] Assume the following is added to class C.

    public String toString() { 
       int azAgeIn2018 = 2018 - 1912;
       return "Arizona is " + azAgeIn2018 + " years young!";
    }

    What does System.out.println(new C()); print?

[9] System.out.println(new R().hashCode());  prints: 1808253012.
    No  public int hashCode()  method is implemented in class R.
    Briefly explain why this compiles and runs?

[10] If  public int hashCode() { return 48; }  is added to 
     class R, then what does the following statement print?

     System.out.println("Arizona is state# " + new R().hashCode());

State whether you believe fantasy sports in cricket is skills-based or chance-based and why using the information and data within this case.   

Cushing's disease is characterized by muscular weakness due to adrenal or pituitary dysfunction. To provide effective treatment, it is important to detect childhood Cushing's disease as early as possible. Age at onset of symptoms and age at diagnosis (months) for 15 children suffering from the disease were given in an article. Here are the values of the differences between age at onset of symptoms and age at diagnosis. −70 −33 −44 −27 −35 −52 −15 −23 −62 −8 −80 −8 −58 −48 −19

(b) Calculate a lower 95% confidence bound for the population mean difference. (Use age at onset of symptoms − age at diagnosis. Round your answer to two decimal places.) months

(c) Suppose the (age at diagnosis) − (age at onset) differences had been calculated. What would be a 95% upper confidence bound for the corresponding population mean difference? (Round your answer to two decimal places.) months

In all parts of this problem, assume that we are using fair, regular dice (six-sided with values 1, 2, 3, 4, 5, 6 appearing equally likely). Furthermore, assume that all dice rolls are mutually independent events.

(a) [4 pts] You roll two dice and look at the sum of the faces that come up. What is the expected value of this sum? Express your answer as a real number.

(b) [7 pts] Assuming that the two dice are independent, calculate the variance of their sum. Express your answer as a real number.

(c) [7 pts] You repeatedly roll two fair dice and look at the sum. What is the probability that you will roll a sum of 4 before you roll a sum of 7? Express your answer as a real number.

(d) [7 pts] What is the expected number of rolls until you get a sum of 4 or a sum of 7? (For example, if you get 7 on the first roll, the number of rolls is 1.) Express your answer as a real number.

(e) [7 pts] You roll 10 dice. Using the Chernoff Bound, give an upper bound for the probability that 8 or more of them rolled a 1 or a 2? You don’t need to calculate the value with a calculator (since you do not have one), but please write it in simplest terms.

Assume that you have a sample of n 1 equals 8​, with the sample mean Xbar1 equals 50​, and a sample standard deviation of S1 equals 7​, and you have an independent sample of n2 equals 15 from another population with a sample mean of Xbar2 equals 33​, and the sample standard deviation S2 equals 5. Construct a 95​% confidence interval estimate of the population mean difference between mu 1 and mu 2. Assume that the two population variances are equal. (blank) is less than or equal to mu1 minus mu2 which is less than (blank). What is the 95% confidence interval

Using a cost of capital of 11​%, calculate the net present value for the project shown in the following table and indicate whether it is​ acceptable

You extracted DNA and recorded the absorbance at two wavelengths. A260= .7 and A280= .39.

A) is your DNA pure?

B) Determine the concentration of your DNA, knowing that 50 ug/ml DNA has an absorbance of 1 at 260nm.

The beginning inventory at Dunne Co. and data on purchases and sales for a three-month period ending June 30 are as follows:

Required:

1. Record the inventory, purchases, and cost of merchandise sold data in a perpetual inventory record similar to the one illustrated in Exhibit 3, using the first-in, first-out method. Under FIFO, if units are in inventory at two different costs, enter the units with the LOWER unit cost first in the Cost of Goods Sold Unit Cost column and in the Inventory Unit Cost column.

2. Determine the total sales and the total cost of goods sold for the period. Journalize the entries in the sales and cost of goods sold accounts. Assume that all sales were on account.

3. Determine the gross profit from sales for the period.
$fill in the blank 101

4. Determine the ending inventory cost as of June 30.
$fill in the blank 102

A local manufacturing company builds two products on the same production line that consists of seven workstations. The times in hours and process stations are listed below. Process 1 Process 2 Process 3 Process 4 Process 5 Process 6 Process 7 Product A 0.25 1.75 1.0 1.5 1.5 2.75 0.25 Product B 0.25 0.75 0.5 1.5 0.5 0.75 0.25 The standard times for Product A is 9.0 hours and Product B is 4.5 hours. The company averages 22 units of Product A and 55 units of Product B per month. The company’s typical month is 22 days. Currently the production line is in a straight line configuration but management read a study that said cellular manufacturing is a better solution. Specifically they are interested in a U-shaped cell. They have approached you to setup the cellular work cell and determine how many workers will be needed. Before they implement this U-shaped cell, write a memo that explains the benefits of the cellular design over the current straight line layout and whether or not they should implement the cellular layout. Include how many employees are needed including the calculations, which processes would be worked by each employee, how many workstations are needed, and how the workstations should be arranged.

The amount of oxygen consumption was measured in seven individuals over two periods of time while sitting with their eyes closed. During the first period, they listened to an exciting adventure story; during the second period of time, they heard restful music. The researcher is not sure whether participants will consume more or less oxygen during the story compared with the music. Here are their results:

1. Use the 5 steps of hypothesis testing
   1. Use excel (include populations & hypotheses in excel document)
2. Sketch the distribution with cut-off value (s) and sample score, and regions of acceptance and rejection labeled.
3. Summarize what you found.