Exam 1: Looking at Datadistributions

The bar graph below represents the highest education level achieved for 30 random females and 60 random males questioned on a street in downtown Washington,DC. Approximately how many people are college graduates?

As part of a large ongoing study on the treatment of women with breast cancer,the treatment time (in months)of eight patients whose lymph nodes were cancer-free is recorded.Treatment time is defined as the time from the moment the cancer treatment starts until the patient is declared cancer-free. What is the mean treatment time for these eight women?

The histogram below represents the height (in inches)of the gold medal-winning high jumps for the Olympic Games up to Sydney 2000. What is approximately the mean height?

Consider the following data which describe the amount of time in minutes students spend studying for a quiz: 10,11,11,12,12,14,15,18,19,20,22,24,39,40,41,44,46,50,52,52,53,55,70. What numbers make up the stem?

When examining a distribution of a quantitative variable,which of the following features do we look for?

On the first day of class,statistics professors ask each student to fill out a demographic questionnaire to learn information about their class.Which of the following variables is/are quantitative?

The units of measurement are an important part of the description of what type of variables?