# Stat Help Please

posted by
**Taylor**
.

Yearly stock returns on India's Sensex Index are well described by a Normal model with a mean of 18.36% and a standard deviation of 14.65%. give the stock return cutoff for the middle 30% of all years.

I used TI-83 Calc. for these. Can someone check them? Thank you!

Q1=InvNorm(.35,16.36,14.65)=10.72

Q3=InvNorm(.65,16.36,14.65)=22.00