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A sample of student opinions at a Big Ten University was obtained by first dividing all students into one of the 200 possible majors, and then doing a SRS (Simple Random Sample) of the majors to select only 10 majors. Once the 10 majors were selected, every student in these 10 majors was selected to be part of the study. This kind of sample is called a:

Which histogram displayed as a larger class width?

Researchers are is interested in if there is a positive relationship between alcohol consumption and anxiety? To answer the question, the researchers surveyed a large sample of adults. They asked each participant how much alcohol they consume in a typical week. They also asked each participant to take an anxiety survey. This research study is said to be:

Which of the following is not a requirement of a Simple Random Sample?

To avoid experimenter bias, when the experimenter nor the participant is aware of which group the participant is in, this is known as:

The following two box plots show the distributions for cargo space (volume in cubic feet) for both SUV’s and Minivans. Based on the box and whisker plot for Minivan data, the best statistical measurements for center and spread are:  

Identify the variable number of siblings as:

As part of a survey of college students, a researcher is interested in the variable class standing (i.e. freshmen, sophomore, junior, senior). The variable class standing is:

When analyzing qualitative data (ie. hair color, blood type), the best measure of central tendency to describe the data is:

The number of rooftops with solar panel installations in 5 cities is shown in the graph. If the total number of installations is 27,500, what is an appropriate label for the vertical axis of the graph?