Answer: The standard error of the mean = 0.5
Step-by-step explanation:
Given : Sample size : n = 144
Standard deviation : ![\sigma=6\text{ hours}](https://tex.z-dn.net/?f=%5Csigma%3D6%5Ctext%7B%20hours%7D)
The formula to find the standard error of the mean is given by :-
![S.E.=\dfrac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=S.E.%3D%5Cdfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
i.e. ![S.E.=\dfrac{6}{\sqrt{144}}=0.5](https://tex.z-dn.net/?f=S.E.%3D%5Cdfrac%7B6%7D%7B%5Csqrt%7B144%7D%7D%3D0.5)
Hence, the standard error of the mean =0.5
What are you trying to find?
Answer:
Ty!
Step-by-step explanation:
:)
Answer:
7.81mph
Step-by-step explanation:
Using the pythagoras theorem;
resultant r is expressed as;
r² = 5² + 6²
r² = 25 + 36
r² = 61
r =√61
r = 7.81mph
Hence the resultant speed is 7.81mph