Answer:
The term professional communication refers to the various forms of speaking, listening, writing, and responding carried out both in and beyond the workplace, whether in person or electronically. 
Explanation:
 
        
             
        
        
        
Answer:
 
      
Explanation:
Data given and notation      
 represent the sample mean
 represent the sample mean      
 represent the standard deviation for the sample
 represent the standard deviation for the sample      
 sample size
 sample size      
 represent the value that we want to test
 represent the value that we want to test    
 represent the significance level for the hypothesis test.
 represent the significance level for the hypothesis test.    
t would represent the statistic (variable of interest)      
 represent the p value for the test (variable of interest)
 represent the p value for the test (variable of interest)  
State the null and alternative hypotheses.      
We need to conduct a hypothesis in order to determine if the mean is lower than 5600, the system of hypothesis would be:      
Null hypothesis: 
      
Alternative hypothesis: 
      
We don't know the population deviation, so for this case is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:      
 (1)
 (1)      
t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  
Calculate the statistic      
We can replace in formula (1) the info given like this:      
 
      
 
        
             
        
        
        
Answer:
Price weighted index
Explanation:
A price weighted index is an index used in stocks where each company that is part of the index makes up a fraction of the total, and is proportional to its price per share.
Higher weight is given to sticks that have higher prices.
Rice weighted index is a good way to track track portfolio performance that best match for your portfolio.
 
        
             
        
        
        
Answer:
Quantity of oil bought & sold would depend upon relative change i.e increase & decrease in demand & supply respectively. 
- ↑Dd = ↓Sy : Qty same 
- ↑Dd > ↓Sy : Qty ↑ 
- ↑Dd < ↓Sy : Qty ↓
Explanation:
Libya is an exporter of Oil to China. It implies china's demand for oil is satisfied by Libya's imports. 
Usual markets are at equilibrium when market demand = market supply, demand & supply curves intersect. 
Political unrest in Libya decreasing oil production, would decrease supply (exported) of oil to China & sift supply curve leftwards. Simultaneously, increase in China demand for oil would shift the demand curve rightwards. These changes in demand, supply would create excess demand. Excess demand would cause competition among buyers & increase the new equilibrium price. 
However, <u>Quantity </u>of oil bought & sold would depend upon relative change , shift in demand & supply. If increase in demand is equal to decrease in supply, the quantity would remain<u> same.</u> If increase in demand is more than  decrease in supply, quantity will <u>increase</u>. If increase in demand is less than decrease in supply, the quantity will <u>decrease.</u>