A hotel asks its patrons to add a gratuity for the housekeeping service. The options are five dollars, ten dollars, fifteen dollars, and twenty dollars. What is the level of measurement of the data?
Select the correct answer below:
nominal
ordinal
interval
ratio
Matthew wants to estimate the mean height of students attending his college. He records the heights of 450 randomly selected students attending the college. What is the population?
Select the correct answer below:
the mean height of the randomly selected students
the mean height of all students attending the college
the 450 randomly selected students
all the students attending the college
the heights of the randomly selected students
In a study on study habits, a researcher randomly selected an equal number of men and women to survey. Is the study observational or experimental? If it is an experiment, what is the controlled factor?
Select the correct answer below:
The study is an experiment. The controlled factor is a person’s study habits.
The study is an observational study.
The study is an experiment. The controlled factor is the survey.
The study is an experiment. The controlled factor is the category, men or women.