Anne, bob, and carol- all biostatisticians and epidemiologists- are emailing each other about plans for the weekend. Anne suggests that they all go surfing to Santa Cruz, but bob writes back indicating that he is reluctant to do so because he is terrified of sharks. Carol responds by arguing that P(great weekend | surfing) is 0.80 and P(great weekend | no surfing) is 0.50. Assuming that Carol’s probabilities are correct, further assume for this example that each person’s weekend happiness is independent of any other person’s weekend happiness:

1. Given that all friends go surfing, what is the probability that all 3 of them have a great weekend?

2. Given that all 3 friends go surfing, what is the probability that 2 of them have a great weekend and 1 of them does not have a great weekend? (Hint, how many ways could 2 of the friends have a great weekend?)

Please read the text below and answer the following questions..

Santa Barbara is a small (imaginary) nation in Central America. Universidad Nacional de 
Santa Barbara (the National University of Santa Barbara) is the most prestigious 
university in the region. The main campus is in the capital, Ciudad de Santa Barbara, and 
enrolls more than 25,000 students in bachelor's, master's, and doctoral programs covering 
a wide variety of academic disciplines. Three regional campuses enroll approximately 
10,000 additional students.
A meeting is scheduled between a group of senior administrators of Universidad 
Nacional de Santa Barbara and sales representatives from Z-Term Solutions, a major 
supplier of instructional technology consulting services including installation hardware 
and software for distance education and video conference.
The American representatives of Z-Term Solutions are on the third week of a seven 
country sales trip. The firm's specialty is videoconference solutions for business and 
education. The firm provides consulting, sales, installation, and service. Z- 
Term Solutions carries the best brands and the most up to date equipment. The firm is 
eager to expand its sales in Central and South America. In an effort to do so, Z-Term 
Solutions hired a sales team leader from the Central America region.   
The two representatives of Universidad Nacional de Santa Barbara are high-level 
administrators with responsibility for strategic and financial planning. The Minister of 
Education routinely endorses any agreements approved by these two administrators. Both 
of these two administrators come from well-established families and have important 
connections in the Prime Minister's office. Both are on career paths that will likely lead to 
high positions in one of the ministries as their careers progress. 


1. If you were the sales team leader from the Central America region of Z-Term Solutions, what motivation strategy would you use to enhance the two American sales representatives global negotiation skills?  

Develop your own three original discussion questions in relation to the case scenario above. 


1.
2.
3.

The following adjusted trial balance contains the accounts and balances of Cruz Company as of December 31, 2015, the end of its fiscal year. No. Account Title Debit Credit 101 Cash $ 18,000 126 Supplies 8,400 128 Prepaid insurance 2,000 167 Equipment 23,000 168 Accumulated depreciation—Equipment $ 6,500 301 T. Cruz, Capital 42,725 302 T. Cruz, Withdrawals 6,000 404 Services revenue 37,000 612 Depreciation expense—Equipment 2,000 622 Salaries expense 21,571 637 Insurance expense 1,554 640 Rent expense 2,479 652 Supplies expense 1,221 Totals $ 86,225 $ 86,225

1. Prepare the December 31, 2015, closing entries for Cruz Company. Assume the account number for Income Summary is 901.

2. Prepare the December 31, 2015, post-closing trial balance for Cruz Company.

The lecturer claims that the underlying true average mark for this exam is 67. The lecturer wants to test if the new cohort marks (sample mean: 52.222, sample variance: 153.651, n: 130) support this hypothesis. The minimum and maximum marks in the new cohort are 27.421 and 76.607 respectively.

a. Write down the null and alternative hypothesis we would use to test the lecturers claim that the true average mark is 67.

b. What are the assumptions for conducting a hypothesis test around this data? Are these satisfied? You may assume that more than 1300 students take the course each year.

c. Calculate the p-value for your hypothesis.

d. What is the conclusion for your hypothesis test?

Prof. Weiner is interested in analyzing the distribution of the variable X=’grading in Microeconomics for Policy Analysis’. He collected administrative information from the School from 1990 to 2010 and based on this data he concludes X follows a normal distribution with mean 75 and variance 30.

2.1 What is the probability that a typical student from the current cohort enrolled in Microeconomics for Policy Analysis receives a grade above 80?

2.2 Between what values will the grades of 95% of all students in the current cohort fall?

2.3 Find the value that represents the 25^th and 75^th percentile of this distribution. Then, find the interquartile range. Can a student who got 45 be considered a potential outlier?  

1.Why plastic beams are not used to construct buildings and bridges?List THREE properties that make

plastics unsuitable for this application?

2.How a temperature drop of 50 C below 0 C would affect polythene bottle? Explain.

3.What type of bonding explains function of adhesives?

4.Can ceramic materials be used as material for the beams? If not, explain why? List properties that make

them unsuitable for this application?

As the U.S. grapples with a growing list of transportation infrastructure needs and limited public funds, more states are looking to public-private partnerships as a means of fixing and replacing aging bridges, tunnels and roads. Should the private sector help rebuild American infrastructure? Is there a downside for taxpayers?​ what would be the engineer's opinion?

which one of the following statements is most incorrect about the strengths of cohort studies

1. cohort studies measures the risk of developing a disease

2. cohort studies enable researchers to assess a range of diseases associated with the exposure being studied or investigated

3. in cohort studies, the exposure precedes the disease

4. cohort studies measures the incidence of a disease

5. in cohort studies, the exposure does not precede the disease and thus enables the researcher to ascertain the occurrence of the disease