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| # Activity Questions | ||
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| ## Part 1. Examining the Data | ||
| 1. What data is found in the column labeled "Fe_Mehlich3"? Why would we be interested how much of this is in the soil? (You may have to search the internet for this answer.) | ||
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| 2. What data is found in the column labeled "Base_Sat_pct"? What does this variable tell us about the soil? | ||
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| 3. How many observations are in the soil testing values dataset that you loaded? What do each of these observations refer to? | ||
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| 4. How many different regions are represented in the soil testing dataset? How many of them have soil testing data available? | ||
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| ## Part 2. Summarizing the Data with Statistics | ||
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| 5. All the samples from Baltimore City and Montgomery County were collected from public park land. The parks sampled from Montgomery County were located in suburban and rural areas, compared to the urban parks sampled in Baltimore City. Why might the Montgomery County samples have a lower average arsenic concentration than the samples from Baltimore City? | ||
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| 6. What is the mean iron concentration for samples in this dataset? What about the standard deviation, minimum value, and maximum value? | ||
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| 7. Calculate the mean iron concentration by region. Which region has the highest mean iron concentration? What about the lowest? | ||
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| 8. Calculate the maximum values for concentrations that were determined using EPA Method 3051. (HINT: change the function you call in the `summarize` statement.) Which of these metals has the maximum concentration you see, and in which region is it found? | ||
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| 9. Calculate both the mean and maximum values for concentrations that were determined using the Mehlich3 test. (HINT: change the terms in the `columns_to_include` vector, as well as the function you call in the `summarize` statement.) Which of these metals has the highest average and maximum concentrations, and in which region are they found? | ||
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| ## Part 3. Visualizing the Data | ||
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| 10. Create a histogram for _iron_ concentration, as well as a boxplot comparing iron concentration by region. Is the iron concentration similar among regions? Are there any outlier sites with unusually high or low iron concentrations? | ||
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| 11. Create a histogram for _lead_ concentration, as well as a boxplot comparing lead concentration by region. Is the lead concentration similar among regions? Are there any outlier sites with unusually high or low lead concentrations? | ||
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| 12. Look at the maps for [iron](https://biodigs.org/#iron_map) and [lead](https://biodigs.org/#lead_map) on the BioDIGS website. Do the boxplots you created make sense, given what you see on these maps? Why or why not? |
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| <meta name="date" content="2024-08-28" /> | ||
| <meta name="date" content="2024-09-09" /> | ||
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| <meta name="viewport" content="width=device-width, initial-scale=1" /> | ||
| <meta name="apple-mobile-web-app-capable" content="yes" /> | ||
| <meta name="apple-mobile-web-app-status-bar-style" content="black" /> | ||
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| <link rel="shortcut icon" href="assets/GDSCN_style/gdscn_favicon.ico" type="image/x-icon" /> | ||
| <link rel="prev" href="exploring-soil-testing-data-with-r.html"/> | ||
| <link rel="prev" href="activity-questions.html"/> | ||
| <link rel="next" href="references.html"/> | ||
| <script src="libs/jquery-3.6.0/jquery-3.6.0.min.js"></script> | ||
| <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/fuse.min.js"></script> | ||
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| <ul> | ||
| <li class="chapter" data-level="13.1" data-path="exploring-soil-testing-data-with-r.html"><a href="exploring-soil-testing-data-with-r.html#before-you-start"><i class="fa fa-check"></i><b>13.1</b> Before You Start</a></li> | ||
| <li class="chapter" data-level="13.2" data-path="exploring-soil-testing-data-with-r.html"><a href="exploring-soil-testing-data-with-r.html#objectives-1"><i class="fa fa-check"></i><b>13.2</b> Objectives</a></li> | ||
| <li class="chapter" data-level="13.3" data-path="exploring-soil-testing-data-with-r.html"><a href="exploring-soil-testing-data-with-r.html#part-1.-data-import"><i class="fa fa-check"></i><b>13.3</b> Part 1. Data Import</a></li> | ||
| <li class="chapter" data-level="13.4" data-path="exploring-soil-testing-data-with-r.html"><a href="exploring-soil-testing-data-with-r.html#part-2.-data-summarization"><i class="fa fa-check"></i><b>13.4</b> Part 2. Data Summarization</a></li> | ||
| <li class="chapter" data-level="13.5" data-path="exploring-soil-testing-data-with-r.html"><a href="exploring-soil-testing-data-with-r.html#part-3.-data-visualization"><i class="fa fa-check"></i><b>13.5</b> Part 3. Data Visualization</a></li> | ||
| <li class="chapter" data-level="13.3" data-path="exploring-soil-testing-data-with-r.html"><a href="exploring-soil-testing-data-with-r.html#part-1.-examining-the-data"><i class="fa fa-check"></i><b>13.3</b> Part 1. Examining the Data</a></li> | ||
| <li class="chapter" data-level="13.4" data-path="exploring-soil-testing-data-with-r.html"><a href="exploring-soil-testing-data-with-r.html#part-2.-summarizing-the-data-with-statistics"><i class="fa fa-check"></i><b>13.4</b> Part 2. Summarizing the Data with Statistics</a></li> | ||
| <li class="chapter" data-level="13.5" data-path="exploring-soil-testing-data-with-r.html"><a href="exploring-soil-testing-data-with-r.html#part-3.-visualizing-the-data"><i class="fa fa-check"></i><b>13.5</b> Part 3. Visualizing the Data</a></li> | ||
| </ul></li> | ||
| <li class="chapter" data-level="14" data-path="activity-questions.html"><a href="activity-questions.html"><i class="fa fa-check"></i><b>14</b> Activity Questions</a> | ||
| <ul> | ||
| <li class="chapter" data-level="14.1" data-path="activity-questions.html"><a href="activity-questions.html#part-1.-examining-the-data-1"><i class="fa fa-check"></i><b>14.1</b> Part 1. Examining the Data</a></li> | ||
| <li class="chapter" data-level="14.2" data-path="activity-questions.html"><a href="activity-questions.html#part-2.-summarizing-the-data-with-statistics-1"><i class="fa fa-check"></i><b>14.2</b> Part 2. Summarizing the Data with Statistics</a></li> | ||
| <li class="chapter" data-level="14.3" data-path="activity-questions.html"><a href="activity-questions.html#part-3.-visualizing-the-data-1"><i class="fa fa-check"></i><b>14.3</b> Part 3. Visualizing the Data</a></li> | ||
| </ul></li> | ||
| <li class="chapter" data-level="" data-path="about-the-authors.html"><a href="about-the-authors.html"><i class="fa fa-check"></i>About the Authors</a></li> | ||
| <li class="chapter" data-level="14" data-path="references.html"><a href="references.html"><i class="fa fa-check"></i><b>14</b> References</a></li> | ||
| <li class="chapter" data-level="15" data-path="references.html"><a href="references.html"><i class="fa fa-check"></i><b>15</b> References</a></li> | ||
| <li class="divider"></li> | ||
| <p style="text-align:center;"> <a href="https://github.com/jhudsl/OTTR_Template" target="blank" > This content was published with</a> <a href="https://bookdown.org/" target="blank"> bookdown by: </a> </p> | ||
| <p style="text-align:center;"> <a href="https://hutchdatascience.org/"> The Fred Hutch Data Science Lab </a></p> | ||
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@@ -309,7 +315,7 @@ <h1>About the Authors<a href="about-the-authors.html#about-the-authors" class="a | |
| ## collate en_US.UTF-8 | ||
| ## ctype en_US.UTF-8 | ||
| ## tz Etc/UTC | ||
| ## date 2024-08-28 | ||
| ## date 2024-09-09 | ||
| ## pandoc 3.1.1 @ /usr/local/bin/ (via rmarkdown) | ||
| ## | ||
| ## ─ Packages ─────────────────────────────────────────────────────────────────── | ||
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@@ -388,7 +394,7 @@ <h1>About the Authors<a href="about-the-authors.html#about-the-authors" class="a | |
| </div> | ||
| </div> | ||
| </div> | ||
| <a href="exploring-soil-testing-data-with-r.html" class="navigation navigation-prev " aria-label="Previous page"><i class="fa fa-angle-left"></i></a> | ||
| <a href="activity-questions.html" class="navigation navigation-prev " aria-label="Previous page"><i class="fa fa-angle-left"></i></a> | ||
| <a href="references.html" class="navigation navigation-next " aria-label="Next page"><i class="fa fa-angle-right"></i></a> | ||
| </div> | ||
| </div> | ||
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