Introduction to Probability and Statistics

Is honey a cough remedy?

Does a teaspoon of honey before bed really calm a child’s cough? To test the folk remedy, pediatric researchers carried out a designed study involving a sample of 105 children who were ill with an upper respiratory tract infection.

On the first night, parents rated their children’s cough symptoms on a scale from 0 (no problems at all) to 30 (extremely severe). On the second night, the parents were instructed to give their sick child a dosage of liquid “medicine” prior to bedtime.

Unknown to the parents,
• a first group: are given a dose of honey.
• a second group: are given a similar dosage of dextromethorphan (DM), i.e., cough medicine.
• a third group (the control group) gave their sick children no dosage at all.

Again, the parents rated their children’s cough symptoms, and the improvement in total cough symptoms score was determined for each child. The data (improvement scores) for the study is given below:

Honey Dosage: 12 11 15 11 10 13 10 4 15 16 9 14
10 6 10 8 11 12 12 8 12 9 11 15

10 15 9 13 8 12 10 8 9 5 12

DM Dosage: 4 6 9 4 7 7 7 9 12 10 11 6
3 4 9 12 7 6 8 12 12 4 12 13
7 10 13 9 4 4 10 15 9

No Dosage (Control): 5 8 6 1 0 8 12 8 7 7 1
6 7 7 12 7 9 7 9 5 11 9

5 6 8 8 6 7 10 9 4 8 7

3 1 4 3

Question: Use R to complete the following table:
Honey Dosage   DM Dosage   No Dosage (Control)
Mean          

Median          

Standard Deviation
          
Interquartile Range          

Write a 1-page review of a transportation planning model used by
any transportation agency
- The agency can be a planning entity (such as a metropolitan
planning organization), a DOT, or other
- Cite references on additional page

(c) You are currently working for an international energy think-tank specialising in the transport sector. The mayor for Kuala Lumpur has asked for your opinion on which transport infrastructure would be more suitable for his city in the next 10 years: bus rapid transit system or light-rail transit system. Very briefly describe the TWO (2) transport infrastructures. Provide recommendations on which system you think would best fit Kuala Lumpur, with You are free to choose one solution, a combination of both solutions, or suggest a different solution altogether

Construction Civil Engineering. Thanks

A bridge replacement, including 2km approach resurfacing on each side.

Question: Make a Gantt chart of all major activities

A rectangular oonaete cbBlIDCI (II - 0.01S) is 3,0 m (9.84 ft) ... ide,has II longitudinal slope 0( 0.001, and a di9Ctlarge rate of 5.0 am (176 e&). If the channel ends in a free outfall.. compute the water surface profile for I distance of ISO m (500 tt) upstream of the Qutfall.

Explain why there is a straight line offset at the early time stage when analyzing aquifer test data using Cooper-Jacob straight line technique?

Do pumping tests represent aquifers heterogeneity?

A rigid strip footing with a width of B is constructed above the ground on a clay deposit, overlying bedrock. The depth of clay layer is H and the water level is at the natural surface. Before construction of the footing, laboratory tests on a saturated clay sample, taken at a depth of B/2 below the ground surface, provided the following properties:

Compression Index = Cc , Recompression Index = Cr , Consolidation Coefficient = cv

Over Consolidation Ratio = OCR, Water Content = w%, Specific Gravity = Gs

Assume the vertical uniform surcharge stress on the footing including the weight of footing and column = q

(a) Calculate the initial saturated unit weight of clay deposit.

(b) Based on the elastic theory (Boussinesq’s equation), calculate the excess pore water pressures at the depth of B/2 immediately after applying the surcharge load. Assume the vertical stress (q) is applied instantaneously.

(c) Using theory of 1-D consolidation, calculate the total average settlement of this rigid footing due to consolidation of the clay layer, long time after applying the total load.

(d) Determine the average settlement of this rigid footing after n days of applying the total load due to consolidation of clay deposit.

You have been asked to acceleration the schedule on the project and to minimize the cost impact. Address the options noted below and discuss the pros and the cons for each.

a. Fast-tracking

b. Adjusting leads and lags on connected activities. Remember a lag means starting an activity before the successor has been completed.

c. Adding resources

d. Resource leveling

e. Crashing f. Use of alternate work calendars/schedules

The settlement of foundations is typically the result of three separate occurrences that take place in the soil which provides support. List these factors and give a brief description of each.

Explain the difference between soil compression, soil consolidation, and compaction. Explain the difference between a normally consolidate and an over-consolidated soil deposit.   

Please type your answer instead of writing out your answer on paper.

Define the different ways that glass can be affixed to framing systems?

Describe each of the systems used for metal and glass curtain wall design?

Consider a 12 - mile segment of an existing four - lane freeway having very restricted geometry with rolling terrain. Peak hour volume is 2000 veh/h and the flow consist of 12% trucks and 3% recreational vehicles. The traffic is commuter type with peak hour factor 0.92. The freeway segment can be accessed by 6 on - ramps and has 8 off - ramps. Freeway consists of two lanes in each direction of 11 feet width with lateral clearance of 6 feet. Find the LOS of freeway during peak hour. (Assume basic free flow speed to be 70mi/hr)

(M & W) Consider a residential area and two shopping centers that are possible destinations. From 7-8 PM on Friday night, 950 shopping vehicle trips leave the residential area for the two shopping centers. A joint shopping-trip mode-destination choice logit model is estimated and is given the following coefficients.

If shopping centers 1 and 2 have 245,000 ft2 and 420,000 ft2 of commercial floor space, respectively, determine the distribution of Friday night shopping trips by destination and mode. (Hint: Your choice set in this MNL model is four: 1) to center 1 by auto; 2) to center 1 by bus; 3) to center 2 by auto; and 4) to center 2 by bus.)

#5-16)-A freeway ramp has following characteristics

Radius of inner edge of pavement equal to 100 ft.

One way, one lane operation with no provision for passing a stalled vehicle

Design traffic condition A

Barrier curb on both sides.

The ramp pavement width needed (ft) is most nearly?

1. 17
2. 18
3. 16
4. 15

QUESTION 1)

You are an engineer and its know that your project /activities plant production had cause an adverse health safety and environmental (HSE) impact. To improve the (HSE) quality, you have to cease your project activities or production for a period, resulting in the inability to meet the schedule and targets. how would you handle in a situation where there is a conflict between the IEM Regulation on Professional conduct and commercial consideration?

Question 2)

Engineers are often entrusted with the responsibility of implementing large scale projects involving millions of ringgits .in view of the large amount of money changing hands the integrity and ethical standards of engineers are being put to test . what measures can an engineer take to prevent corruption and unethical practice of cutting corners in order to safeguard the good image of the engineering profession?