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Solved Examples
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 eee The total revenue of five companies are represented in the bar graph. What is the difference between the revenue earned by company B and company D? eee View Solution
 eee The bar graph represents the rainfall in a city from October to December. Find the range of the data. eee View Solution
eee A survey conducted by the Educational Department reveals the expenditure on the secondary and high schools. Pick an appropriate bar graph which represents the data shown in the table.
 Year Secondary School (in \$millions) High School (in \$millions) 1985 325 225 1990 361 240 1995 418 274 2000 425 277
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eee Customers of a food store were asked to rate the taste of a new health drink as Poor(P), Good(G), or Excellent(E). The data collected is shown here:
 G E P G E G E G P G E G G G E P G E G P E P G E G

Which graph represents the Pareto chart for the given data?  eee
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eee Which among the Pareto charts represents the frequency of the reasons for late arrival of an employee on a particular year?
 Causes for late arrival Number of occasions Family problems 8 Woke up late 20 Had to take the bus 4 Traffic tie - up 32 Sick 6 Bad weather 3
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 eee The pie chart represents the expenditure on different sports by a school authority in a calender year. If the expenditure on Tennis is \$880, then what is the expenditure on each sport? eee View Solution
eee The orbital velocities of the planets in our solar system are shown in the table. Construct a Pareto chart for the data.
 Planet Velocity (mi/sec) Mercury 29.7 Venus 21.8 Earth 18.5 Mass 15.0 Jupiter 8.1 Saturn 6.0 Uranus 4.2 Neptune 3.4 Pluto 3.0
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eee In a survey, the percentage loss of forest cover is as recorded.
 Region Percent Asia/Pacific 76 Europe (Excluding Russia) 75 Russia 24 Africa 68 America 35
Represent the data in a Pareto chart. eee
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 eee The dot plot shows the number of chocolates each student of a class has. How many more chocolates does David have than Joe? Who among the following has median number of chocolates? eee View Solution
 eee The sales of a local electronic goods store in a particular month is shown in the bar graph. What was the difference between the sales of washing machines and refrigerators in that month? eee View Solution
 eee Find the decrease in the number of birds from 1997 to 1999 from the bar graph as shown. In which year did the zoo have the least number of birds? eee View Solution
 eee The bar graph displays the number of people who eat different food items. Find the difference in the number of people who eat Burgers and Deserts. Which of the dot plots represent the data? eee View Solution
 eee The number of phone calls received by Nathan during each day of the week are in the dot plot. Find the average number of calls Nathan received per day. eee View Solution
 eee The number of various kinds of snakes found in a zoo are shown in the dot plot. What is the total number of snakes in the zoo? eee View Solution
eee The number of children of different age living in a housing complex are shown in the table. Select an appropriate dot plot for the data.
 Age Number of children 13 6 14 8 15 9 16 7 17 4

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eee Construct a pie graph for the points scored by a student in final examination representing the percentage of scores in each subject.
 Subject Score English 82.5 Math 105 Science 120 French 135 History 97.5

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 eee Find the mean and mode of the dot plot as shown. eee View Solution
eee The sale of food items in U.S. for the year 2000 is shown in the table.
I. What is the angle made by the sale of bevarages in the pie chart?
II. Find the ratio of the percentage sale of dairy to the sale of produce.
III. What fraction of sales is grain / cereals?
 Food items Sales (\$) Dairy 114255.50 Beverages 79807.65 Confections 76223.75 Meat/Poultry 76958.83 Seafood 51674.80 Grains/Cereals 62039.82 Condiments 50491.47 Produce 43278.18

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eee The preferences of a group of 300 students to different soft drinks are detailed in the table.
 Soft drink Number of Students Pepsi - Cola 92 Diet Coke 78 Mt Dew 48 7 UP 42 Others 40
Construct a pie graph for the data representing the central angle for the number of students preferring each soft drink.
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eee The mode of transport of a group of students to the school is shown in the table.
 Mode of transport Number of students Walking 9 Train 10 Tram 6 Car 12 Bicycle 3
What fraction of the students travel by train? Find the ratio of the percentage of the students traveling by bicycle to the students walking to the school. eee
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 DD  The number of poems written by students in a competition is shown in the dot plot. What is the fraction of poems written by Tom?  DD View Solution
 DD  Calculate the percentage raise in the number of vehicle registrations from 1990 to 2000 from the graph.  DD View Solution
 DD  The manager of ABC company investigated the reasons for the delay associated with processing 67 credit card applications. Pareto chart for the data is shown. Find the total percentage of customers who have not signed on the applications and who have not given their addresses.  DD View Solution
DD  The sales of a fruit vendor is shown in the table. Construct a pie chart.
 Types Number of Sales Percent Apples 120 12% Strawberry 300 30% Orange 160 16% Mangoes 200 20% Others 220 22%
What is the difference between the sales percent of mangoes and apples?
DD
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 DD  The pie chart represents the expenditure of a family on different items. Answer the following questions by analyzing the pie chart.I. Find the percentage expenditure on Fuel.II. What fraction of expenditure is spent on Housing?III. Find the percentage difference in the expenditure of Clothing and Others.  DD View Solution