This was my last weeks homework and I never got these correct. What am I doing wrong please help me solve these .
#statistics help !
slim bone
dire caveBOT
halcyon yarrow
well for first one it's not z-score, you'd need to look at a table of values.
or calculator alternatively
what resources are you given?
slim bone
Nothing 😦
My teacher just said I had to do that
Like just like that
And I have no idea what’s even going on
I wanna cry hehe 😭
halcyon yarrow
well are you given any like program like R to do statistical analysis within?
hmm
slim bone
@halcyon yarrow no she just said I need a calculator
halcyon yarrow
AH
halcyon yarrow
are you supposed to have a particular calculator?
slim bone
TI 86
Something like that
But I’m using google calculator version of it online
Since I can’t afford it
halcyon yarrow
ah...is it an online class?
slim bone
Yah 😦
I’ve always sucked so bad at math
And my dad is gonna be so pissed if I don’t understand these hehe
halcyon yarrow
ahwait
but the idea for both of these is to use z-score formula once you obtain the value from each, for the first you obtain the Z-score corresponding to .70 (70% of area behind it in the standard normal distribution)
then once you have that $Z_{1}$, you can do the following $Z_{1}=\f{X-\mu}{\f{\sigma}{\sqrt{n}}}$
tawny dirgeBOT
Moosey
halcyon yarrow
where $X$ is the value you want, $\mu$ is your population mean, $\sigma$ your standard deviation, and $n$ your sample size
tawny dirgeBOT
Moosey
halcyon yarrow
as for the second one
you must find the z-score, i.e. you're given x, mu, sigma, and n, then use that to find the probability
sometimes calculators ask about left tail and right tail, and this is just asking respectively if you want the area to the left (values smaller) or right (values larger)
hope that helps :)
@slim bone
slim bone
OMG THXXX