In: Statistics and Probability
Assume the average stock price for companies making up the S&P 500 at certain time period is $40, and the standard deviation is $10. Assume the stock prices are normally distributed. Assume the stock prices are normally distributed. From Table 1: Cumulative Probabilities for the Standard Normal Distribution, what is the probability company will have a stock price of at least $50?
0.9332
0.8413
0.1583
0.0068
None of the above
2.
Let Z be the standard normal random variable. What is P(Z>1.38)?
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 0.0087  | 
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 0.0708  | 
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 0.0838  | 
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 0.1075  | 
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 None of the above  | 
3.
A researcher has collected the following sample data.
  
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 5  | 
 12  | 
 7  | 
 9  | 
 5  | 
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 6  | 
 7  | 
 5  | 
 13  | 
 4  | 
The 25th percentile from manual work is
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 5  | 
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 6  | 
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 7  | 
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 8  | 
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 None of the above  |