statistics

After completing Assignment 2, some students are suspicious that data we used was NOT randomly selected. One of the comments was "It seems unlikely that there would be exactly the same number of married and not married households in the sample." Let's test this! You randomly survey 30 households to determine whether the head of household is married or not married. You want to compare this to the national average of 48% of households with a married head of household. 25. What is the random variable and the parameter? 26. What type of distribution do you expect, and why? 27. What is the probability that 15 heads of household will be married