Graphs, variables and methods of data collection Essay

Graphs, variables and methods of data collection - Essay Example They are divided into numerous pieces, which give clear comparison side by side (Freud 05). For clearer comparison, various graphs should be evenly spaced using the right scale and by observing accuracy when plotting the various points. This paper will examine four types of graphs including Line graphs, Bar Graphs, Pie Charts and Histograms, as presented in different news mediums. In the line graph that is examined, the variable used on the X-axis includes months and that on the Y-axis is revenue in million dollars. The data collection methods include questionnaires and sampling. This line graph shows that, despite the increase in market share, the income has not increased significantly. The other type of graph that is examined is Pie chart. The variables used here include occupancy in terms of revenue earned, which is shaded in green and un-occupied rooms represented by the un-shaded region. The data collection methods used includes sampling, questionnaires and surveys. The pie charts compare the occupancy rates between years 2007 to 2009 for Ritz-Carlton and All Marriott hotels. Further, the pie chart shows that Ritz-Carlton has more clients as shown by high occupancy rates compared as with All Marriott brands (Freud 25). Histogram is the third type of graph that is reviewed. The methods of data collection used include questionnaires, surveys, and sampling. The general conclusion is that the histogram compares the sale of light vehicles amongst General motor (GM), Ford, Chrysler, Toyota, Honda and other small manufactures of light vehicles. In addition, the graph shows that many light vehicles were sold by all the companies between 2006 and 2008 as compared to 2009 to 2010 (Jelen 25). The last graph that is examined is a bar graph. The variables used are fuel consumption in terms of liters, on the X-axis and percentage of sales made, on the Y-axis. Data collection methods include