Chicago Homicides Draw and compare two time series graphs...

Chicago Homicides Draw and compare two time series graphs for the number of homicides in the Chicago area. $$ \begin{array}{lll}{\text { Year }} & {\text { Homicides }} & {\text { As of June } 29} \\ \hline 2005 & {451} & {207} \\ {2007} & {448} & {204} \\ {2009} & {459} & {204} \\ {2011} & {435} & {187} \\ {2013} & {414} & {180}\end{array} $$

Chicago Homicides Draw and compare two time series graphs for the number of homicides in the Chicago area.
$$
\begin{array}{lll}{\text { Year }} & {\text { Homicides }} & {\text { As of June } 29} \\ \hline 2005 & {451} & {207} \\ {2007} & {448} & {204} \\ {2009} & {459} & {204} \\ {2011} & {435} & {187} \\ {2013} & {414} & {180}\end{array}
$$

Key Concepts

Time Series Data

Time series data consists of observations recorded sequentially over time. This type of data allows for the identification of trends, patterns, or cycles by showing how a particular variable changes at different points in time.

Data Visualization

Data visualization involves the graphical representation of data to make its patterns and trends accessible and understandable. In the context of time series data, graphs like line graphs are particularly useful for depicting changes over periods and for highlighting differences between distinct sets of data.

Comparative Analysis

Comparative analysis in the context of time series graphs involves evaluating two or more data series simultaneously. This allows for the assessment of similarities and differences in trends, enabling deeper insights into how different datasets behave over the same time intervals.

Trend Analysis

Trend analysis is the process of evaluating data over time to determine general patterns or directions. It is a crucial aspect of time series analysis that helps in making forecasts and understanding underlying factors driving the changes observed in the data.

Transcript

00:01 Hey there, for this question, we have data of chicago homicide numbers starting from 2005 to 2013.

00:11 I'm going to draw two times serious graph to illustrate the data.

00:15 Let's first draw our x -axis and y -axis.

00:22 We know that for times series graph, x -axis means time, right? and y -axis means the value with respect to the corresponding time.

00:34 Time point that we can draw different points and line them up well for this first one let's let's draw according to year from 2005 to 2013 we have two points sorry we have five points in total this is five seven nine eleven and thirteen for example five here denotes 2005 certain here denotes 2013.

01:10 Let's just draw it at least for simplicity.

01:14 And let's see how many homicide are there.

01:20 For example, in 2005, it's 451.

01:24 And we know that all of the numbers are within 400 to 500.

01:31 So let's just set this to be 400 and this to be 500.

01:42 For the first year or 2005 we have how much size of 350 so it's approximately here 451 right this is our first dot and for second it is 448 slightly lower than the first and for the third one 459 it is higher than the first guess it should be right here and for next one 4355 it is a lower among the first four, which i guess should be approximately here.

02:22 For the last one, it is 414, which is again lower.

02:28 So it should be like here.

02:31 And let's connect these five adjacent points with blind segments from a back drawing.

02:43 Okay, so our first -time series graph look like this...

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