Answer:
the portfolio´s beta is 1.65
Explanation:
when the individual calculation of beta has been given, is possible to aggregate them as a weigthed average, so it is possible to apply te next formula

where w is the weigthed value for each asset, in this particular case we have:

so with this result we get 1.65
Answer:
2.77
the bus company should decrease price to increase revenues.
Explanation:
Price elasticity of demand measures the responsiveness of quantity demanded to changes in price of the good.
Price elasticity of demand = percentage change in quantity demanded / percentage change in price
If the absolute value of price elasticity is greater than one, it means demand is elastic. Elastic demand means that quantity demanded is sensitive to price changes.
Demand is inelastic if a small change in price has little or no effect on quantity demanded. The absolute value of elasticity would be less than one
Demand is unit elastic if a small change in price has an equal and proportionate effect on quantity demanded.
percentage change in price = 1.21 / 0.99 - 1 = 0.222 = 22%
Percentage change in quantity demanded = 169 / 433 = -0.6097 = - 60.97%
Elasticity of demand = 60.97% / 22% = 2.77
Demand is elastic, so if price in reduced, there would be a rise in quantity demanded that would exceed the rise in price. This would increase revenues
Answer a. Estimate a population proportion.
Explanation:
A population proportion denotes a specific attribute of a population measured in percentage, the above analysis is on losing weight by the populace.
A mean only refers to the average of the population without reference to a particular quality.
The analysis is not testing a claim but it's only making reference to earlier findings on the population. A claim would have given us a specific quality which the population has been predicted or established to adhere to.