1 | Mean µ | StDev σ | |||
A | -10 | 5 | |||
B | 0 | 10 | |||
C | 10 | 15 | |||
2a | 2b | 2c | |||
µ | 3.874 | 3.874 | 3.874 | ||
σ | 2.938 | 2.938 | 2.938 | ||
x | 3.874 | 0.936 | 0.000 | ||
z | 0.000 | -1.000 | -1.319 | ||
p | 0.500 | 0.159 | 0.094 | ||
2d | |||||
right area | 0.200 | ||||
left area | 0.800 | ||||
z | 0.841 | ||||
x | 6.346 |
Question 2c diagram. The probability for profit is the green area on the left below