MULTIPLE CHOICE QUESTIONS.

2. In a survey of 200 randomly selected Pasadena residents, only 8% of them used public transportation. Which of the following describes the population for this survey?

All Pasadena residents.

The 200 Pasadena residents were selected for this survey.

All Pasadena residents who use public transportation.

All Pasadena residents who do not use public transportation.

3. In a college with 200 males and 300 females who are taking elementary statistics, 50 students are needed for a study. The researchers decide to randomly select 20 males and 30 females. This is an example of which type of sampling method?

none of these

stratified

systematic

cluster

6. Consider the data {10, 15, 20, 25, 25}. Which of the following measures would NOT change if one of the 25 was replaced by a 30?

mean

mode

range

median