Credit Quiz 2A

Which of the following is a categorical variable?

Zip code

Which of the following is not part of the Big Picture of Statistics?

Publishing data

A sample of 12th grade students who took the National Assessment of Education Progress year 2000 mathematics test had a mean score of 250. What is the population?

All 12th grade students who took the National Assessment of Educational Progress year 2000 mathematics test

Researchers for the National Institute of Child Health and Human Development studied 208 infants whose brains were temporarily deprived of oxygen as a result of complications at birth. These babies were subjects in an experiment to determine if reducing body temperature for three days after birth improved their chances of surviving without brain damage. What is the population?

All babies who were temporarily deprived of oxygen as a result of complications at birth

What is the final step in the Big Picture of Statistics, as outlined in class?

Inference

What does the statistical term "population" refer to?

It refers to the group we want to study or learn something about

Which of the following is a false statement about statistics?

Statistical information is never misleading or misrepresented.

A student in Stat 121 wants to estimate the mean score on the Stat 121 final exam from last semester. They asked 200 students who took the class last semester what their final exam score was and recorded it. What is the sample?

The 200 students interviewed

Researchers for the National Institute of Child Health and Human Development studied 208 infants whose brains were temporarily deprived of oxygen as a result of complications at birth. These babies were subjects in an experiment to determine if reducing body temperature for three days after birth improved their chances of surviving without brain damage. What is the sample?

The 208 babies who were a part of this experiment

The purpose of statistics is to convert data into useful information.

True