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Answer:
1.2803
Step-by-step explanation:
According to the Question,
- Given That, You want to invest in companies belonging to Gispa Group of 1 Companies, Inc. so you did some research and found out that companies belonging to this group have an average gain of 0.8 percent and a standard deviation of 0.7 percent.
- And, a positive percent (gain) means profit and a negative percent means a loss. If you choose 20 companies.
Therefore, We have Average Gain(ц) = 0.8%
Standard deviation(σ) = 0.7%
Number of Companies(n) = 20
- So, the probability that the companies are gaining more than 1 percent is
= (σ² × n) / ц ⇒ (0.7²×20) / (0.8*10) = 1.2803
