insight 08 questions

[vidang]

Core:
Q2 i get D, ANS: C
mean = 3.5, i use TI-nspire calc
and i keep coming up with 3.5 anyone know how to do this on ti-nspire?

Q3 i get B, ANS: A
solutions incorrect? as she is in the bottom 16% as we're talking about running a time in seconds?
why is it top 16%? because she has a higher score then the mean meaning she is below the average of 65.2 a she only scored 66.8

Q8 i get B, ANS: E
this is how i worked it out
12+13+8+19 divide by 4 = 13, which is july august sept oct
then
13+8+19+11 divide by 4 = 12.75, whiuch is auguest sept oct nov
therefore 13+12.75 divide by 2 = 12.875?

"please explain"

[_avO]

Q2 I got mean of 3.65, double check if you got these numbers:
1 1, 2 2 2 2 2, 3 3 3, 4 4, 5 5 5 5, 6 6 6 6

Q3 You are definitely right, it is the bottom 16%. But VCAA will probably NOT have something this ambiguous!

Q8 Gotta read the question it asks for the 4 moving median so you only find the average of 13+8 and 8+19

[vidang]

oh god damnit median -_-'
sigh thanks man