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
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