Answer:
Kindly check explanation
Step-by-step explanation:
Given the following :
True mean(μ) = 77.9
True standard = 20
Sample size (n) = 50
Sample mean (m) = 82.1
Sample standard deviation (s) = 18.6
The standard error (SE) :
SE = sample standard deviation / √sample size
SE = 18.6 / √50
SE = 2.6304372
SE = 2.63
The correct answer is 120
Response:
8.47 AM
Explanation step-by-step:
Everyone will take 16 hours,
This could take 18 hours for Brianne;
In 1 hour, then a fraction of 1/16 is achieved by Allen.
A proportion of 1/18 is done in 1 hour Brianne
Within one hour, they complete a fraction (1/18 + 1/16) while operating together.
= 144/17,
Therefore, they must work together to finish the whole project;
144/17 = 8.47 a.m.
}---------------<>--------------{
CORRECT ME IF I'M WRONG!
<em>Hope that helps</em>
<em />
<em />
If you could make this answer Brainiest that would be great!