Answer: Standard error.
Step-by-step explanation:
If the population is normally distributed , then the standard deviation of a sampling distribution of the sample mean ![[tex]\overline{x}](https://tex.z-dn.net/?f=%5Btex%5D%5Coverline%7Bx%7D)
[/tex] is known as standard error which depends on population standard deviation 
and the sample size (n).
It measure the variability in the sample statistics that happens by chance.
Thus, the standard deviation of a sampling distribution is called the <u>standard error</u>.
The unit rate would be number of miles per hour ( 1 hour).
Divide the total number of miles by the total number of hours:
100 miles / 4 hours = 25 miles per hour.
The unit rate is 25 miles.
Answer:
X=5
Step-by-step explanation:
Answer:
3 + 5x = 38
Three more than five times equals 38
