1. You want to know the average amount of time that UT students spend signing up for classes during
their registration window. You plan to obtain a stratified random sample of students (by classification).
a. What is your variable of interest?
b. What is your population of interest?
c. What is your likely sampling frame?
d. What is your sample? What does it mean to say it is stratified?
e. What possible sources of bias (other than classification) might you need to avoid?

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.