Answer:
1) 25
2) 3.507
3) 4.35
Step-by-step explanation:
Note: from the question, the number of F2F data is 15 not 12
1) for degree of freedom:
12 + 15 - 2 = 25
2) formula for standard error:

But A is standard deviation. To find the standard deviation we use:
S.d = [sqrt*(E(xi - u)^2) / N]
Where xi = mean
u = individual data
Therefore
Mean = (60+100+95+80+67+88+76+86+90+95+91+100) / 12 =
1028/12 = 85.7














![S.d = sqrt*[(E(xi-u)^2)/N]](https://tex.z-dn.net/?f=%20S.d%20%3D%20sqrt%2A%5B%28E%28xi-u%29%5E2%29%2FN%5D%20)


So, standard error for online class=

3) We will use same method as in number two.
Mean= 1169/15 =77.93
S.d = √(4238.85/15) = 16.81
For standard error of F2F class:

Note: E represents summation here
Thanks for your question, Broker U's package will cost her $156.02 less than broker V's.
12m^2/h》cm^2/min
12m^2/h × 1 h/60 min=.2m^2/min
.2m^2/min × 10000cm^2/1 m^2=2000 cm^2/min
2000cm^2/min
Answer:
Answer: A: 48
Step-by-step explanation:
15 divided by 2.5=6
20 divided by 2.5=8
6*8=48
Answer:proved
Step-by-step explanation:
Sum of interior angles of a polygon=180
Sum of interior angles of a polygon=180(n-2)
n=number of sides
a triangle have 3 sides n=3
Sum of interior angles of a triangle=180(3-2)
Sum of interior angles in a triangle=180 x 1
Sum of interior angles in a triangle=180°