Darby's company reported net income after taxes of $2,000,000, on sales of $225 million. her boss asked her to calculate the ear
1 answer:
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The closest to the minimum number of consumers needed to obtain the estimate with the desired precision is (b) 271
Explanation:
When the prior estimate of population proportion is not given , then the formula to find the sample size is given by :-
where E = Margin of error.
z* = Critical z-value.
As per given , we have
E = 5%=0.05
Confidence level = 90%
The critical value of z at 90% is 1.645 (By z-table)
Put all values in the formula , we get
n=0.25(1.645/0.05)²
n=0.25(32.9)²
n=270.6025≈271
Thus, the minimum sample size needed = 271
Hence , the correct answer is 271 .
Answer:
As a result of the political unrest in Libya, the supply of oil would fall, As a result the supply curve would shift to the left. This would lead to fall in equilibrium quantity and a rise in price.
The increased demand for oil would shift the demand curve to the right. The equilibrium price and quantity would increase
Taking these two effects together, equilibrium price would rise and there would be an indeterminate effect on equilibrium quantity
Please check the attached image for a graph showing these shifts
b. As a result of the change in supply, supply would increase. This would increase equilibrium quantity and equilibrium price would fall. in addition with the increase in demand for oil, equilibrium quantity would rise and there would be an indeterminate effect on equilibrium quantity
Explanation:
