Exam 2: Graphical Descriptive Techniques 1

{All-Nighters Narrative} Of those who did well on the midterm,what percentage stayed up all night before the midterm?

In the following cross-classification table,how are gender and house ownership related? ​

The percentage of observations in each combination of the cross-classification table must be equal in order to show two nominal variables are not related.

Your age group (1-9; 10-19; 20-29; 30-39; etc.)is an interval variable.

To evaluate two nominal variables at the same time,a(n)____________________ table should be created from the data.

From a pie chart you are able to find the frequency for each category.

All calculations are permitted on what type of data?

In purchasing a used computer,there are a number of variables to consider.The age of the computer is an example of a(n)____________________ variable.

{All-Nighter Narrative} Of those who stayed up all night before the midterm,what percentage did well on the midterm?

Interval data may be treated as ordinal or nominal.

A cross-classification table summarizes data from two nominal variables.

Using the following cross-classification table,draw two pie charts that compare pet ownership for males vs.females.Are gender and pet ownership related?

To describe the relationship between two nominal variables you make a scatter diagram and look for a correlation.

If two nominal variables are unrelated,then the patterns exhibited in their corresponding bar charts should be approximately the same.If some relationship exists,then some bar charts will differ from others.

Car Buyers Forty car buyers were asked to indicate which car dealer offered the best overall service.The four choices were Contour Motors (C),Modern Chrysler (M),Tonneau Auto (T),and Uncanny Chevrolet (U).The following data were obtained: ​ ​ -{Car Buyers Narrative} Construct a frequency bar chart of this data.Which car dealer came in last place in terms of overall service?

Business School Graduates A sample of business school graduates were asked what their major was.The results are shown in the following frequency distribution. ​ ​ -{Business School Graduates Narrative} How many graduates were surveyed?

Car buyers were asked to indicate the car dealer they believed offered the best overall service.The four choices were Contour Motors (C),Modern Chrysler (M),Tonneau Auto (T),and Uncanny Chevrolet (U).The following data were obtained: What percentage of car buyers identified Contour Motors as having the best overall service?

Nominal data are also called qualitative or categorical.

The Dean of Students conducted a survey on campus.The gender of each student is an example of a(n)____________________ variable.

For each of the following examples,identify the data type as nominal,ordinal,or interval. a.The final grade received by a student in a neuro-science class. b.The number of students in a Physics course. c.The starting salary of a PhD graduate. d.The size of an order of fries (small,medium,large,super-size)purchased by a Burger King customer. e.The college you are enrolled in (Arts and Sciences,Business,Education,etc.).