Answer: 800
Divide 3200 by 4 to get 800.
I believe 62 because it it’s closer to an hour
Answer: The standard error of the mean = 0.5
Step-by-step explanation:
Given : Sample size : n = 144
Standard deviation : 
The formula to find the standard error of the mean is given by :-

i.e. 
Hence, the standard error of the mean =0.5
Answer:
864 miles
Step-by-step explanation:
648/9 = 72 mph
72 x 12 = 864