(a) Food Dragon and Delivery Woo are two main food delivery companies in Hong Kong. Suppose the delivery time of these two companies both follow a normal distribution. A random sample of size 10 is selected from each of the food deliveries. Sample Size mean(mins) standard deviation(mins) Food Dragon 10 20 5 Delivery Woo 10 15 6 Assuming the delivery times of both companies are normal with equal variances, find the 90% confidence interval for the difference between the mean delivery time of Food Dragon and Delivery Woo. [8marks]

(b) A random sample of 1000 citizens from Macau have been tested for the anti-body for the coronavirus. It was found that 150 of these citizens has the anti-body for the coronavirus. Find a 93% confidence interval for the true population proportion of citizens in the Macau with the anti-body. [5 marks]

(c) An engineer wants to find out the concentration of carbon monoxide (µg/m3 ) emitted by a newly invented car. The engineer collected 14 observations in a randomly chosen period. 68, 54, 32, 80, 50, 40, 60, 60, 55, 40, 42, 50, 60, 43 Construct a 95% confidence interval for the mean concentration of carbon monoxide. Assume that the concentrations of CO are normally distributed

A standard poker deck of 52 cards has four suits, (symbols C, H, S, and D) and thirteen ranks (symbols A, 2, 3, 4, 5, 6, 7, 8, 9, T, J, Q, and K). Every card in the deck has both a value and a suit.1 A poker hand is any set of 5 cards from the standard poker deck. There are some special hands in poker, and these have ranks (i.e. some are better, some are worse). From best to worst, the hands are given names as follows:

(a) A royal flush is a hand T, J, Q, K, A all of the same suit.

(b) A straight flush is a hand of five cards in sequence, all in the same suit.

(c) A four of a kind is a hand with four cards of the same rank.

(d) A full house is a hand with a three cards of one rank and two cards of a different rank.

(e) A flush is a hand with any five cards in the same suit.

(f) A straight is a hand with five cards in sequence.

(g) A three of a kind is a hand with three cards of the same rank.

(h) A two pair is a hand with two different pairs.

(i) A pair is a hand with two cards of the same rank.

(j) A high card hand is a hand which fails all of the above.

1. How many poker hands are there?

2. How many royal flushes are there?

3. How many four of a kinds are there?

4. How many three of a kinds are there which are not a four of a kind and not a full house?

5. How many pairs are there (which are not anything more than a pair)?

6. How many full houses are there?

7. How many two pairs are there which are not full houses?

8. How many straight flushes are there (which are not royal flushes)?

9. How many flushes are there (which are not anything more than a flush)?

10. How many straights are there (which are not anything more than a straight)?

11. How many high card hands are there?

c++

(1) Create a class, named Board, containing at least one data member (two-dimensional array) to store game states and at least two member functions for adding players’ moves and printing the game board. Write a driver to test your class.

(2). The data type of the two-dimensional array can be either int or char. As a passlevel program, the size of the board can be hardcoded to 10 or a constant with a pre-set value, anything between 4 and 20

(3). Set the initial state of the board as follows: assuming the size of the board is m*m, the initial position of red player is at (2, 2) and the blue player is at (m-1, m-1) as shown below (where m=5).

|    | | | | |  

| | R | | | |

| | | | | |

| | | | B | |

| | | | | |

(4). program should be able to accept human players’ moves. The format of input can be a pair of characters from ‘U’, ‘D’, ‘L’ and ‘R’. For instance, (U, L) means that the red player plays “up” and the blue player players “left”.

(5). program should be able to check if a move terminates the game (either a player crashes or two players collide). If a move does not terminate the game, the board state should be updated in accordance with the move.

(6). program should redisplay board state after each legal move. The layout of display must be text-based, similar to the following, where ‘R’ stands for red player, ‘B’ for blue player and ‘O’ for visited cells.

|    | O | | | |  

| | R | O | | |

| | | | | |

| | | | B | O |

| | | | O | |

7. Take an input from the user to set the size of the board. For easy display, you can
place a restriction on the board size to 4 - 20. The size should be passed to the board class
via its constructor.

(8). Since the dynamic array needed is two-dimensional, you might have to declare a
pointer of pointers of either int or char to point to the array.

I have implemented till task 6, i need help with 7 & 8.

1. Jessica is a graduate of a University’s business school entrepreneurship program.  As part of her final year of studies, she developed a business plan for a business that develops websites for individuals and commercial businesses.  She put her business plan into action with the help of start-up funding from family and friends, and has been operating for two and a half years.

Jessica has decided to apply the concepts in a balanced scorecard to evaluate and improve her business.  Her vision for this business is to provide clients with high quality websites that receive a relatively high number of hits. Recently, word-of-mouth advertising has led to more requests for websites with creative animated graphics.  As part of her balanced scorecard, she tracked the following measures over the last two years for her individual clients.

50       Required:

1. Based on the information above, does Jessica’s business compete on the basis of low cost or product differentiation?  Explain.
2. Your job is to assist Jessica in interpreting the data she has collected, so that she can determine where her business’ performance is satisfactory, and where she needs to concentrate her efforts in order to improve its performance.  
   1. For each performance measure, indicate how it should be classified on the balanced scorecard. There must be at least one performance measure for each classification.  There are, however, measures that can be included in more than one classification.  Select the classification that you believe is most appropriate.  Fore each performance measure, explain the reason for selecting the category chosen.
   2. Analyze the change in each performance measure from 2018 to 2019, but do not consider each performance measure in isolation.  Provide one possible explanation for the change that has been observed, making sure it is reasonable given all the information available to you.
   3. Evaluate the change in Jessica’s business as a whole from 2018 to 2019.  Identify one or two pieces of additional information needed to be able to complete this evaluation.  Describe why this information is needed.
   4. Make a recommendation as to the one thing Jessica should concentrate her efforts to improve her business in 2020.
3. Provide three reasons why a company could implement a balanced scorecard successfully but see no improvements in its profitability.   Make sure your explanation is sufficiently detailed that it is clear why improvements in profitability were not seen.

Periodic Inventory by Three Methods

Dymac Appliances uses the periodic inventory system. Details regarding the inventory of appliances at January 1, purchases invoices during the next 12 months, and the inventory count at December 31 are summarized as follows:

Required:

1. Determine the cost of the inventory on December 31 by the first-in, first-out method.

If the inventory of a particular model comprises one entire purchase plus a portion of another purchase acquired at a different unit cost, use a separate line for each purchase. If units are in inventory at two different costs, enter the units PURCHASED MOST RECENTLY first.

2. Determine the cost of the inventory on December 31 by the last-in, first-out method.

If the inventory of a particular model comprises one entire purchase plus a portion of another purchase acquired at a different unit cost, use a separate line for each purchase. If units are in inventory at two different costs, enter the OLDEST units first.

3. Determine the cost of the inventory on December 31 by the weighted average cost method.

4a. Which inventory method would be preferred for income tax purposes in periods of rising prices?

4b. Which inventory method would be preferred for income tax purposes in periods of declining prices?

THERE IS NOTHING THAT GOES ON THE RIGHT. MINOR ERROR BY ME

Using SPSS!!! ONY SPSS

13. The table shows the costs per mile (in cents) for a sample of automobiles. At α = 0.01, can you conclude that at least one mean cost per mile is different from the others?

Please download the file final.xlsx and refer to Worksheet A. The average (mean) quantity sold per transaction is _________. Round your answer to the nearest whole number, and enter just the number; e.g., enter 71.5 as 72.

1. Which condition cannot be treated over the counter (OTC)?

A. Tinea pedis
B. Onychomycosis
C. Vulvovaginal candidiasis
D. Jock itch

2. Which of the following is not a mechanism of action of antifungal agents?

A. Inhibiting antimetabolite activity
B. Inhibiting fungal cell wall synthesis
C. Fungal cell membrane destruction
D. Interfering with nucleic acid synthesis

3. Select the drug that should not be taken concurrently with posaconazole.
A. sertraline
B. nitroglycerin SL
C. cimetidine
D. sucralfate

4. Which of the following is false about pressure

injuries?
A. Pressure injuries are "bedsores."
B. To prevent these injuries, you should reposition an immobilized patient every 2 hours.
C. The scale for assessing a patient's risk for developing pressure injuries runs from 1 to 4, with 4 representing the highest risk.
D. Pressure injuries tend to form near bones close to the skin

5.Which answer correctly characterizes wound
severity staging?

A. Stage 1: wounds extend through skin involving
underlying muscle, tendons, and bone.
B. Stage 2: wounds have blisters and an exposed dermis.
C. Stage 3: Infection is not a concern
D. Stage 4: Skin is unbroken from a superficial wound

6. Debridement of dead tissue is accomplished by applying all of the following except

A. collagenase
B. hydrocortisone
C. papain and urea
D. Granulex

7. Which is a potential burn complication?

A. Scarring
B. Bone and joint problems
C. Pneumonia
D. Infection
E. All of the above

8. The most common adverse effect of mafenide is
A. itchiness
B. burning
C. coldness
D. dry skin
11.

Consider a 12 months two-security potential investment from the following three. The correlation coefficients between pairs of the stocks are as follows: Corr(A,B) = 0.85, Corr(A,C) = 0.60, Corr(A,D) = 0.45. Each stock has an expected return of 8% and a standard deviation of 20%.

Your entire portfolio is now composed of stock A and you can add some of only one stock to your portfolio.

Required:

1. Identify the stock to be added to Stock A and determine the optimum portfolio mix.                                                                                                                       [8 Marks]

2. If the overall rate of return on the LUSE is 9%, the risk-free rate is 4%, and the beta of 1.2, is it justifiable to invest in the new portfolio?             [5 Marks]

3. Discuss the assumption of keeping the correlations between stock returns constant in modern portfolio theory.                                                        [7 Marks]