Displaying Descriptive Statistics

111) The following graph shows the average grade point average for a particular college from 2006 until 2013. This graph is an example of a _________. A) line chart B) vertical bar chart C) Pareto chart D) histogram

Answer: A

112) The following graph shows the average grade point average for a particular college from 2006 until 2013. Which one of the following statements is correct? A) Average GPA is the dependent variable in the graph. B) Year is the dependent variable in the graph. C) Historically, the Average GPA of the college tends to decrease. D) There appears to be no relationship between Year and Average GPA.

Answer: A

45) ________ data are values based on observations that can be counted and are typically represented by whole numbers. A) Discrete B) Continuous C) Nominal D) Time series

Answer: A

82) The following chart shows the average number of fast food meals consumed per year by 18- to 24-year-olds. Which of the following statements is not correct? A) The average ticket price has decreased over time. B) The lowest average ticket price occurred in 2006. C) The highest average ticket price occurred in 2012. D) The average ticket price in 2010 was higher than the average ticket price in 2008.

Answer: A

81) The following chart shows the average movie ticket price according to a survey by the National Association of Theater Owners. This chart is an example of a _________ chart. A) horizontal bar B) vertical bar C) stacked bar D) Pareto

Answer: B

94) ________ provide a format to display observations that have more than one value associated with them. A) Histograms B) Contingency tables C) Frequency distributions D) Pie charts

Answer: B

48) ________ display the proportion of observations of each class relative to the total number of observations. A) Frequency distributions B) Cumulative relative frequency distributions C) Relative frequency distributions D) Histograms

Answer: C

51) A statistics professor kept attendance records and recorded the number of absent students per class. This data is displayed in the following histogram with the frequency of each number of absent students shown above the bars. How many total classes do these data represent? A) 46 B) 100 C) 129 D) 150

Answer: C

62) ________ classes are classes with boundaries that do not overlap. A) Equal-size B) Open-ended C) Mutually exclusive D) Close-ended

Answer: C

92) The following table shows the percentage of e-mails that are sent each day of the business week according to an Intermedia survey. Day Percentage Monday 15% Tuesday 23% Wednesday 22% Thursday 21% Friday 19% Which of the following best displays this data? A) horizontal bar chart B) vertical bar chart C) pie chart D) histogram

Answer: C

93) The following table shows the percentage of U.S. energy consumption according to various sources. Source Percentage Petroleum 37% Natural Gas 25% Coal 21% Nuclear 9% All renewable 8% Which of the following best displays this data? A) horizontal bar chart B) vertical bar chart C) pie chart D) histogram

Answer: C

113) The following graph shows the average price of LCD TVs from 2005 until 2012. This graph is an example of a ________. A) histogram B) vertical bar chart C) Pareto chart D) line chart

Answer: D

114) The following graph shows the average price of LCD TVs from 2005 until 2012. Which one of the following statements is correct? A) Year is the dependent variable in the graph. B) Average Price is the independent variable in the graph. C) Historically, the average price of LCD TVs tends to increase. D) Historically, the average price of LCD TVs tends to decrease.

Answer: D

46) ________ are values that can take on any real numbers, including numbers that contain decimal points. This data is often the result of measuring observations rather than counting them. A) Discrete B) Cross-sectional C) Ordinal D) Continuous

Answer: D

50) A ________ is a graph showing the number of observations in each class of a frequency distribution. A) frequency distribution B) polygon C) relative frequency distribution D) histogram

Answer: D

79) The following chart shows the percentage of adults from various countries who admitted to texting while driving in a recent survey. This chart is an example of a _________ bar chart. A) horizontal B) stacked C) clustered D) vertical

Answer: D

89) ________ charts are a specific type of bar chart used in quality control programs by businesses to graphically display the causes of problems. A) Stacked bar B) Clustered bar C) Pie D) Pareto

Answer: D

91) Use a ________ chart if you want to compare the relative sizes of the classes in a frequency distribution and together they comprise all possible categories. A) horizontal bar B) vertical bar C) Pareto D) pie

Answer: D

2) Continuous data are values based on observations that can be counted and are typically represented by whole numbers.

Answer: FALSE

20) Histograms displaying continuous data have gaps between their bars.

Answer: FALSE

24) Quantitative data are values that are categorical, describing a characteristic such as gender or level of education.

Answer: FALSE

32) Each category of a pie chart occupies a segment of the pie that represents the cumulative relative frequency of that category.

Answer: FALSE

39) The dependent variable on scatter plots is placed on the horizontal axis on the graph.

Answer: FALSE

4) Discrete data can have an infinite number of values within a specific interval.

Answer: FALSE

40) The independent variable on scatter plots is placed on the vertical axis on the graph.

Answer: FALSE

43) When graphing a time series, the convention is to place the time data on the vertical axis of the graph.

Answer: FALSE

1) A frequency distribution is a table that shows the number of data observations that fall into specific intervals.

Answer: TRUE

21) Histograms displaying discrete data usually have gaps between their bars.

Answer: TRUE

22) Income and age are examples of data that are technically discrete but are normally displayed in a continuous format.

Answer: TRUE

26) Bar charts can display data either horizontally or vertically.

Answer: TRUE

29) Pareto charts are a specific type of bar chart used in quality control programs by businesses to graphically display the causes of problems.

Answer: TRUE

3) Continuous data is often the result of measuring observations rather than counting them.

Answer: TRUE

31) Pie charts are an excellent tool for comparing proportions for qualitative (categorical) data.

Answer: TRUE

33) When constructing a pie chart, all categories in the data set must be included in the pie.

Answer: TRUE

34) Choose a pie chart rather than a bar chart if you want to compare the relative sizes of the classes to one another and together they comprise all possible categories.

Answer: TRUE

36) Contingency tables help us identify relationships between two or more variables.

Answer: TRUE

41) The dependent variable in a scatter plot is influenced by changes in the independent variable.

Answer: TRUE

42) A data set is known as a times series when each data point is associated with a specific point in time.

Answer: TRUE

5) The only limitation in the number of continuous values within an interval is the level of precision of the measuring instrument.

Answer: TRUE

6) The sum of the relative frequencies for the relative frequency distribution should be equal to or very close to 1.0 due to rounding.

Answer: TRUE

8) A symmetrical distribution is one in which the right side of the distribution looks like the mirror image of the left side of the distribution.

Answer: TRUE

9) The goal of constructing a frequency distribution is to identify a useful pattern in the data and often there is more than one acceptable way to accomplish this with grouped quantitative data.

Answer: TRUE