Chapter 3: Writing a research protocol using STATA

Figure 3.2

Figure 3.2 and Figure 3.3 Output from sample size for two proportions from STATA

Figure 3.2 Code

sampsi .67 .56, power(.9) alpha(.05)

Figure 3.3

Figure 3.3 Output from STATA for sample size of the difference between two means

Figure 3.3 Code

sampsi .67 .56, power(.9) alpha(.05)