1
Statistic I. Business Administration and Management Degree.
University of Barcelona.
Lecturer: Jordi López-Tamayo
UNIT 2. Frequency Distributions
1) A partial relative frequency distribution is given.
a. What is the relative frequency of class D?
b. The total sample size is 200. What is the frequency of
class D?
c. Show the frequency distribution.
d. Show the percent frequency distribution.
2) The top four primetime television shows were CSI, ER,
Everybody Loves Raymond, and Friends (Nielsen Media
Research, January 11, 2004). Data indicating the preferred
shows for a sample of 50 viewers follow.
a. Are these data qualitative or quantitative?
b. Provide frequency and percent frequency distributions.
c. Construct a bar graph and a pie chart.
d. On the basis of the sample, which television show has the
largest viewing audience? Which one is second?
3) In alphabetical order, the six most common last names in
the United States are Brown, Davis, Johnson, Jones, Smith,
and Williams (The World Almanac, 2006). Assume that a
sample of 50 individuals with one of these last names
provided the following data.
Summarize the data by constructing the following:
a. Relative and percent frequency distributions
b. A bar graph
c. A pie chart
d. Based on these data, what are the three most common
last names?
4) The Nielsen Media Research television rating measures the
percentage of television owners who are watching a
particular television program. The highest-rated television
program in television history was the M*A*S*H Last Epis ode
Special shown on February 28, 1983. A 60.2 rating indi cated
that 60.2% of all television owners were watching this
program. Nielsen Media Research provided the list of the 50
top-rated single shows in television history (The New York
Times Almanac, 2006). The following data show the
television network that produced each of these 50 top-rated
shows.
a. Construct a frequency distribution, percent frequency
distribution, and bar graph for the data.
b. Which network or networks have done the best in
terms of presenting top-rated television shows? Compare
the performance of ABC, CBS, and NBC.
5) About 60% of small and medium-sized businesses are
family-owned. A TEC International Inc. survey asked the
chief executive officers (CEOs) of family-owned businesses
how they became the CEO (The Wall Street Journal,
December 16, 2003). Responses were that the CEO
inherited the business, the CEO built the business, or the
CEO was hired by the family-owned firm. A sample of 26
CEOs of family-owned businesses provided the following
data on how each became the CEO.
a. Provide a frequency distribution.
b. Provide a percent frequency distribution.
c. Construct a bar graph. d. What percentage of CEOs of
family-owned businesses became the CEO because they
inherited the business? What is the primary reason a
Some of
Data
are
available in file
Unit_2_Practice_Computing.xlsx
for practicing with Excel
