Answer:2
Step-by-step explanation:
Answer:
Step-by-step explanation:
5 minutes, 8 minutes, 6 minutes
The ratio of that question is 7:12
Answer: 0.4758
Step-by-step explanation:
Given : Mean : 
Standard deviation : 
Also, the new population of pilots has normally distributed .
The formula to calculate the z-score :-

For x=130 lb .

For x=171lb.

The p-value =

Hence, the required probability : 0.4758