* do-file for Supplementary Exercise 6.140 of IPS7e
* see do-file for 6.13 for more details about the commands
version 13 /* see below for a better way with version 14 */

import delimited "H:\VHM\VHM801\Datasets\csv\Chapter 6\ex06_140.csv", clear
summarize odor, d
stem odor
qnorm odor

* Stata 13
cii 100000 30.6 700, level(95)
ttesti 100000 30.6 700 25

* Stata 14
* the ztest command offers inference for a normal distribution with known sigma
ztest odor=25, sd(7) level(95)