* do-file for Supplementary Exercise 6.95 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_095.csv", clear
summarize radon, d

* Stata 13
cii 120000 104.13333 900, level(95)
ttesti 120000 104.133333 900 105

* Stata 14
* the ztest command offers inference for a normal distribution with known sigma
ztest radon=105, sd(9) level(95)