Answer:
Sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.
Step-by-step explanation:
To yield a more accurate estimate of the population mean, margin of error should be minimized.
margin of error (ME) of the mean can be calculated using the formula
ME=
where
- z is the corresponding statistic in the given confidence level(z-score or t-score)
- s is the standard deviation of the sample (or of the population if it is known)
for a given confidence level, and the same standard deviation, as the sample size increases, margin of error decreases.
Thus, random sample of 50 people from population A, has smaller margin of error than the sample of 20 people from population B.
Therefore, sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.
Answer:
x = g/cy
Step-by-step explanation:
To solve for x, we need to isolate it on one side of the equal sign algebraically. In this case, since  is being multiplied by  and  we can divide both sides by  and  to isolate 
Let L=length and W=width and T=total lace
so
2L + 2W = T
and we know
T= 60 and W=20
so
2L + 2(20) = 60
2L + 40=60
2L = 20
so L= ?
To graph a line, all you need is two points, we already know the line goes through (3, -4), and we know its slope is -2 or -2/1, so simply "run it by 1 unit" and "rise it by -2 units", to get a second point,
![\bf slope=\cfrac{\stackrel{rise}{-2}}{\stackrel{run}{1}}\qquad(\stackrel{x}{3},\stackrel{y}{-4})\qquad \qquad (\stackrel{x+1}{4}~~,~~\stackrel{y-2}{-6})](https://tex.z-dn.net/?f=%5Cbf%20slope%3D%5Ccfrac%7B%5Cstackrel%7Brise%7D%7B-2%7D%7D%7B%5Cstackrel%7Brun%7D%7B1%7D%7D%5Cqquad%28%5Cstackrel%7Bx%7D%7B3%7D%2C%5Cstackrel%7By%7D%7B-4%7D%29%5Cqquad%20%5Cqquad%20%20%28%5Cstackrel%7Bx%2B1%7D%7B4%7D~~%2C~~%5Cstackrel%7By-2%7D%7B-6%7D%29)
that's the second point, now just run the line through those two.
Answer:y=3x+14
Step-by-step explanation: