Most vertebrates have testosterone, and have behaviors that are mediated by this hormone. Testosterone can be helpful to animals, by enhancing (e.g.) territory acquisition, or harmful, by (e.g.) causing physiological stress. When male blackbirds are exposed to other male blackbirds, their testosterone levels change. In order to understand the impacts of testosterone on male blackbirds, researchers followed a few individual males, to monitor testosterone changes after encountering another male.   A pre-exposure measurement was made (in nanograms/deciliter) and a post-exposure measurement was taken, data below. Researchers will test the hypothesis that pre-exposure testosterone levels are the same as post-testosterone levels.

(2 points) 1. Does this hypothesis test depend on a t distribution, a Z distribution, or a χ² distribution?

(2 points) 2. What are the df for the test you will do?

(2 points) 3a. Is this a one-tailed, or a two-tailed test?

(2 points) 3b. How would you rephrase the hypothesis test to make it the other way (for instance, if you chose a one-tailed test in 3a, how would you re-phrase my original question to make it a two-tailed test?)

(2 points) 4. What is the hypothesized difference?

(2 points) 5. Calculate your test statistic here:

(2 points) 6. Do you reject or fail to reject the null hypothesis?

(2 points) 7. How would you articulate your conclusion to my grandmother, who would not like to hear about rejecting (or failing to reject) null hypotheses, but would be interested to know about blackbirds?

!!!!!!ANSWER ALL!!!!

Define and discuss Porters’ Generic Strategies

Marvel Parts, Inc., manufactures auto accessories. One of the company’s products is a set of seat covers that can be adjusted to fit nearly any small car. The company has a standard cost system in use for all of its products. According to the standards that have been set for the seat covers, the factory should work 1,040 hours each month to produce 2,080 sets of covers. The standard costs associated with this level of production are: Total Per Set of Covers Direct materials $ 40,560 $ 19.50 Direct labor $ 7,280 3.50 Variable manufacturing overhead (based on direct labor-hours) $ 4,160 2.00 $ 25.00 During August, the factory worked only 600 direct labor-hours and produced 1,800 sets of covers. The following actual costs were recorded during the month: Total Per Set of Covers Direct materials (5,000 yards) $ 34,200 $ 19.00 Direct labor $ 6,660 3.70 Variable manufacturing overhead $ 4,140 2.30 $ 25.00 At standard, each set of covers should require 2.5 yards of material. All of the materials purchased during the month were used in production. Required: 1. Compute the materials price and quantity variances for August. 2. Compute the labor rate and efficiency variances for August. 3. Compute the variable overhead rate and efficiency variances for August.

A paper company requires that the true median height of pine trees exceed 40 feet before they are harvested. A penalty is assigned if the median height is less than 40 feet. The management wants to avoid this penalty. A sample of 24 trees in one large plot is selected, and 7 of them are over 40 feet. Conduct the appropriate hypothesis test to determine if the median height of pine trees in the plot is less than 40 feet. The estimated median is 35 feet. Do not assume normality. Let a = 0.05.

Consider a B-tree allowing splits and free-on-empty. Please show an example of these operations on a data structure containing 15 data items, a fanout of three, and at most three data items per node. Also give the search algorithm (use a give-up scheme).

1. The ReservedRoom Class:

Each ReservedRoom entry has three (data) fields:

• roomID (string) of the classroom e.g. W330, W350, W361, etc.
• courseID (string) which stores which course reserves this room
• time (int): which stores the start time of the reserved slot i.e. 1820 means the reservation starts at 18:20

Thus, the ReservedRoom class will consist of three data members (roomID and courseID, time), in addition to the associated methods needed as follows.

1. The constructor ReservedRoom (r, c, t): constructs a ReservedRoom object with the given parameters.
2. String getRoom(): returns the roomID field.
3. String getCourse(): returns the courseID field.
4. int getTime(): returns the time field.
5. String toString(): returns a String representation of this ReservedRoom entry.

Implement the ReservedRoom ADT using Java programming language.

The RoomsBoard Class:

RoomsBoard is a singly-linked list of ReservedRoom. The class RoomsBoard supports the following operations:

1. void add(ReservedRoom r): adds a new ReservedRoom object to RoomsBoard. The ReservedRoom object should be inserted into the RoomsBoard list such that the nodes of the list appear in non-decreasing order of time.
2. void remove(String roomID): removes all occurrences of the room with this ID.
3. void remove_all_but(String roomID): removes all the reserved rooms except the room with this ID.
4. void removeAll(): clears the RoomsBoard by removing all rooms entries.
5. void split( RoomsBoard board1, RoomsBoard board2): splits the list into two lists, board1 stores the list of reserved rooms before 12:00 and board2 stores the list of rooms after 12:00.
6. void listRooms(): prints a list of the reserved rooms in the roomsboard, in non-decreasing order.
7. Void listReservations( roomID): prints the list of reservations for this room in the roomsboard, in non-decreasing order.
8. int size(): returns the number of reserved rooms stored in the roomsboard.
9. boolean isEmpty(): returns true if the RoomsBoard object is empty and false otherwise.

Implement the RoomsBoard ADT with a singly-linked list using Java programming language. The implementation must utilize the generic class Node as described in Section 3.2.1 of your text. Figure 1 shows a sample RoomsBoard object.

1. The Menu-driven Program:

Write a menu-driven program to implement a roomsboard for a classroom reservations system. The menu includes the following options:

1. Add new room.
   The program will prompt the user to enter the roomID, courseID and time of the new reserved room, then will call the add() method from the RoomsBoard class.
2. Remove all occurrences of a room.
   The program will prompt the user to input the room ID to be removed, then call the remove() method from the RoomsBoard class.
3. Remove all rooms except a room.
   The program will prompt the user to input the room ID to be kept, then call the remove_all_but () method from the RoomsBoard class.
4. Clear the RoomsBoard.

The program will call the removeAll() method from the RoomsBoard class.

5. Split the list of rooms into two lists by calling the method split() from the RoomsBoard class.
6. Display RoomsBoard.
   The program will call the listRooms() method from the RoomsBoard class.
7. Display the reservations of a room.
   The program will call the listReservations() method from the RoomsBoard class to display all reservations of this room with the given roomID.
8. Exit.

The program should handle special cases and incorrect input, and terminate safely. Examples include (but not limited to) the following:

1. Removing a RoomsEntry object from an empty RoomsBoard object.
2. Removing a ReservedRoom object with a roomID that is not in the RoomsBoard object.
3. Displaying an empty RoomsBoard object.
4. Entering an incorrect menu option.

A fundamental building block in human resource management is job analysis. 1.) Describe what is meant by job analysis. 2.) Describe how job analysis is used to develop human resource management programs. 3.) What are major arguments for job analysis? What are major criticisms of job analysis?

What kind of network management protocols are available? What information can these protocols provide? Explain it with example.

Which of the following statements is correct?

a. sigma subscript x with bar on top end subscript equals fraction numerator sigma over denominator square root of n end fraction, where sigma = (sampled) population standard deviation and n = sample size--assuming n/N less or equal than .05, where N = (sampled) population size.

b. The sampling distribution of x with bar on top is either normally distributed, when the sampled population distribution is normal, or can be approximated by a normal distribution as the sample size becomes large, when the sampled population distribution is not normal.

c. By increasing the sample size, we increase the probability of obtaining a sample mean that is closer to the (sampled) population mean.

d. All of the above.

•Explain how to prepare for the ultimate crisis in an organization through succession planning

What is path sensitization? Why do we do it or why it is important, explain with an example?

1. Suppose it’s warm and raining outside in Big Town. A cold front will pass Big Town in 3 hours. Behind the front, it is cold and snowing.
   1. Make a persistence forecast for Big Town, 6 hours from now.

2. Would you expect this forecast to be correct? Explain.

3. Now, make a forecast for Big Town using the steady-state forecasting method.

Transferrin is the iron-transport protein found in blood. It has a molecular mass of 81000 and carries two Fe³⁺ ions. Desferrioxamine B is potent iron chelator used to treat patient with iron overload. It has a molecular mass of 650 and can bind one Fe³⁺. Desferrioxamine can take iron from many sites within the body and is excreted (with its iron) through the kidneys. The molar absorptivities of these compounds are given in the following table. Both compounds are colorless (no visible absorption) in the absence of iron.

                                                               e (M^-1 cm^-1)                    

l (nm)                           Transferrin            Desferrioxamine

428                          3540                   2730

470                          4170                   2290       

  (a) A solution of transferrin has an absorbance of 0.463 at 470 nm in a 1.000 cm cell. Find the concentration of transferrin in mg/mL and the concentration of iron in μg/mL.

(b) After addition of desferrioxamine (which dilutes the sample), the absorbance at 470 nm was 0.424 and the absorbance at 428 nm was 0.401. Calculate the fraction of iron in transferrin. Remember that transferrin binds two Fe³⁺ ions and desferrioxamine binds only one.