A random sample of n = 4 scores is obtained from a population with a mean of m = 80 and a standard deviation of s = 10. if the s
ample mean is m = 90, what is the z-score for the sample mean
1 answer:
I'm just guessing but maybe its 11.
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Answer:
The extension of the 6-kg load is 3.75 cm
Step-by-step explanation:
4/2.5 = 6/x
Cross multiply:
4x = 15
15/4 = x
x = 3.75
Answer:
<u>x = 5</u>
Step-by-step explanation:
See attached image.
5+4/7(21+ 3X)= 41
-5
4/7(21+3x)=36
*7/4
21+3x=63
-21
3x=42
/3
x=14
Draw out and you'll see if make a triangle. Use Pythagorean theorem
you are given c and the other side
So,
c2 = a2 + b2
20^2 = 12^2 + b2
400 = 144 +b2
256 = b2
b = 16
Hope this helps
N= 1
1(1-1)-4 = 0-4 = -4
n=2
2(2-1)-4= 2-4= -2
n=3
3(3-1)-4= 6-4= 2
n=4
4(4-1)-4= 12-4= 8