Answer:

Step-by-step explanation:
Given: 76,45,64,80,92
Required: Determine the standard deviation
We start by calculating the mean

Where x-> 76,45,64,80,92 and n = 5



Subtract Mean (71.4) from each of the given data

Determine the absolute value of the above result

Square Individual Result

Calculate the mean of the above result to give the variance


Hence, Variance = 255.298
Standard Deviation is calculated by 



Answer:
41/20
Step-by-step explanation:
or 2 1/20
The one that goes from corner to corner......i think if i get it wrong sorry
Answer:
5 minutes
Step-by-step explanation:
the liters is at zero at the 5 minute mark
272155
I hope I helped, good luck