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)?
0.0087 |
||
0.0708 |
||
0.0838 |
||
0.1075 |
||
None of the above |
3.
A researcher has collected the following sample data.
5 |
12 |
7 |
9 |
5 |
|
6 |
7 |
5 |
13 |
4 |
The 25th percentile from manual work is
5 |
||
6 |
||
7 |
||
8 |
||
None of the above |