Answer:
Step-by-step explanation:
its 22.00 or just 22
Answer:
What is the question? Can you show more info or show anything they gave you?
Step-by-step explanation:
To answer (a), we will need to find the Z value for 710 hours and 990 hours.


B) 68% of data lies between one standard deviation of the mean.
850 +70 = 920
850 - 70 = 780
Answer:
c
Step-by-step explanation: