anonymous
  • anonymous
The standard normal curve shown below models the population distribution of a random variable. What proportion of the values in the population lies between the two z-scores indicated on the diagram? A. 0.6825 B. 0.6375 C. 0.7881 D. 0.6766 E. 0.4263
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
anonymous
  • anonymous
@skinny23 @amistre64 @Luis_Rivera @mathslover @ajprincess
anonymous
  • anonymous
ive never done this in math sorry :/

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More answers

amistre64
  • amistre64
there are a few ways to approach this, the question is what approach are you spose to use? ztables, ti83 calculator, other programs?
anonymous
  • anonymous
I'm not sure, it's an online class so they just give me the answer and expect me to know the answer. @amistre64
amistre64
  • amistre64
do you have a ti83 by chance? if not we can drum up a ztable from google images
anonymous
  • anonymous
Yes I have one!
amistre64
  • amistre64
yay! hit 2nd, VARS, and select normalCDF
anonymous
  • anonymous
It is a TI-84
amistre64
  • amistre64
same thing
anonymous
  • anonymous
Okay, done!
amistre64
  • amistre64
its the TI-Nspire that requires a doctorial degree in astroengineering to master
amistre64
  • amistre64
now, there are 4 elements of this function: low, high, mean, std since they give us Zs, the last 2 are not needed normalCDF(low,high)
anonymous
  • anonymous
Okay! what is my next step? :)
anonymous
  • anonymous
Would i put normalCDF(-1.3,0.75)?
amistre64
  • amistre64
after inputing the low value and high value ... hit enter :/ normalCDF(-1.3, 0.75) ... enter
anonymous
  • anonymous
How would i write the coma in my calculator?
amistre64
  • amistre64
hit the comma key
amistre64
  • amistre64
should be above the 7
anonymous
  • anonymous
Never mind, I got it. I got .317329858
amistre64
  • amistre64
try it again
amistre64
  • amistre64
2nd Vars normalCDF(-1.3,.75) enter
anonymous
  • anonymous
.6765721712?
amistre64
  • amistre64
much better :)
anonymous
  • anonymous
YAY!
anonymous
  • anonymous
so my answer would be D. 0.6766 :D
anonymous
  • anonymous
THANK YOU SO MUCH!!!
amistre64
  • amistre64
a table could have gotten us there as well, it just would have been a little more complicated :)
anonymous
  • anonymous
Thank you so much, you're amazing!!!!

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