Q2. Deciles of Normal distributions:
The deciles of any distribution are the 10th, 20th..., 90th percentiles, respectively.
a) What are the first and last deciles of the standard Normal distribution?
b) The weights of 9-ounce potato chip bags are approximately Normal with mean 9.25 ounces and standard deviation 0.15 ounce. What are the first and last deciles of this distribution?