Exam 2: Frequency Distributions and Graphs

The following time-series plot presents the population growth (in percent) of a suburb of Atlanta, Georgia for each of the years 1990 through 2009 . Estimate the rate of growth in $2007 .$

The three most commonly used graphs in research are the histogram, the , and the cumulative frequency graph (ogive).

Which of the following is a Pareto chart?

The following table presents the rate of population growth of a suburb of Atlanta, Georgic of the years 1990 through 2009 . Construct a time-series plot of the growth rate. Year Percent Growth Year Percent Growth 1990 3.1 2000 5.5 1991 3.3 2001 5.2 1992 4.3 2002 4.4 1993 3.5 2003 4.2 1994 4.4 2004 4.1 1995 5.7 2005 4.7 1996 5.2 2006 5.9 1997 6.4 2007 6.2 1998 5.6 2008 5.2 1999 5.8 2009 4.6

One hundred students are shown an eight-digit number on a piece of cardboard for three seconds and are asked to then recite the number from memory. The process is repeated until the student accurately recites the entire number from memory. The following histogi presents the number of trials it took each student to memorize the number. How many students memorized the number in three trials or less?

What are the boundaries of the class 1.87-3.43?

The following frequency distribution presents the weights in pounds (lb) of a sample of visitors to a health clinic. Clinic Visitor Weights Weight (lb) Frequency 120-129 4 130-139 13 140-149 23 150-159 42 160-169 32 170-179 24 180-189 9 190-199 3 Construct a relative frequency histogram.

A weatherman records the amount of rain that fell in Portland, Oregon each day for a year. What type of graph should he use to show how rainfall changes during the year?

For a given data set, the ogive and the frequency polygon will have the same overall shape.

Construct a dotplot for the following data. 16 13 14 12 15 13 14 14 12 12 14 13 13 14 12 13 15 14 12 16

For the class 5-19, the upper class limit is

A time series graph is useful for detecting trends that occur over the period of time.

The following frequency distribution presents the frequency of passenger vehicles that pa: through a certain intersection from 8:00 AM to 9:00 AM on a particular day. Vehicle Type Frequency Motorcycle 8 Sedan 87 SUV 88 Truck 31 Construct a relative frequency distribution for the data.

The cumulative frequency for a class is the sum of the frequencies of the classes less than and equal to the upper boundary of the specific class.

A sample of 200 high school students were asked how many hours per week they spend u television. The following frequency distribution presents the results. Time Spent Watching Television Number of hours Frequency 0.0-3.9 71 4.0-7.9 59 8.0-11.9 32 12.0-15.9 18 16.0-19.9 18 20.0-23.9 2 Construct a relative frequency ogive for the frequency distribution. watching

When two sets of data collected over specific periods of time are compared on the same graph using two lines, it is called a compound time series graph.

$\text { What type of graph is the figure below? }$

Construct a pie chart for the following distribution: Year in School Number of Students Freshmen 28 Sophomores 14 Juniors 40 Seniors 18

A time series graph is useful for which of the following purposes?