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:
need points sorry 38484343
Step-by-step explanation:
Answer:
what???!!!! I don't understand! you can writen again
Answer:
because you have to multiply the 100x12= 1200 than multiply that by another 1200
Step-by-step explanation: