For Example 3.4, construct a data set with 3835 observations. Include three columns: column 1 is the stratum number (from 1 to 7), column 2 contains the response variable of gender (0 for males and 1 for females), and column 3 contains the sampling weight Nh / nh for each observation. Using columns 2 and 3 along with (3.10), calculate Ṕstr. Is it possible to calculate SE (Ṕstr) by using only columns 2 and 3, with no additional information? Explain.