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Chapter 2: Q2.1 (page 40)
Give an example, other than those presented in this section, of
a) Qualitative Variable
b) Discrete Qualitative Variable
c) Continuous Quantitative Variable
A) Level of honesty, Intensity of love
B) Number of people, Numbers on a die
C) Weight & height of people
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Number of Siblings. Professor Weiss asked his introductory statistics students to state how many siblings they have. The responses are shown in the following table. Use single-value grouping.
Patients who undergo chronic hemodialysis often experience severe anxiety. Videotapes of progressive relaxation exercises were shown to one group of patients and neutral videotapes to another group. Then both groups took
the State-Trait Anxiety Inventory, a psychiatric questionnaire used to measure anxiety, on which higher scores correspond to higher anxiety. In the paper "The Effectiveness of Progressive Relaxation in Chronic Hemodialysis Patients" (Journal of Chronic Diseases, Vol. 35, No. 10), R. Alarcon et al. presented the results of the study. The following data give score results for the group that viewed relaxation-exercises videotapes. Use limit grouping with a first class of 12-17 and a class width of 6 .
a. determine a frequency distribution.
b. obtain a relative-frequency distribution.
c. construct a frequency histogram based on your result from part (a).
d. construct a relative-frequency histogram based on your result from part (b).
Identify an important reason for grouping data.
An online article from the Washington Post titled 'Facebook joins rank of largest IPOs in US History' race the following information on the top 10 IPOs (initial public offerings) in the United States as of May 2012
a. What type of data is presented in the first column of the table ?
b. What type of data is presented in the second column of the table ?
c. What type of data is presented in the third column of the table ?
d. What type of data is provided by the information that Facebook is a social networking website
Explain the difference between
a. frequency and relative frequency.
b. percentage and relative frequency.
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