Fix typos in Chapter 3 (#515)

* Fix description of time variable classification

I don't find the explanation of _why_ the colon makes the data categorical here very convincing, but I'm certain, at least, that this part is a typo.

* Fix typos and capitalization in questions

Author: ClaytonHughes

data-applications.qmd

@@ -144,7 +144,7 @@ For categorical variables, determine if the variable is ordinal.
 The numerical variables in the dataset are `year` (discrete), and `time_min` (continuous).
 The categorical variables are `city`, `country_of_games`, `division`, `type`, `name`, and `country_of_athlete`.
 The `time` variable is trickier to classify -- we can think of it as numerical, but it is classified as categorical.
-The categorical classification is due to the colon `:` which separates the hours from the seconds.
+The categorical classification is due to the colon `:` which separates the minutes from the seconds.
 Sometimes the data dictionary (presented in @tbl-paralympic-var-def) isn't sufficient for a complete analysis, and we need to go back to the data source and try to understand the data better before we can proceed with the analysis meaningfully.
 :::
 
@@ -375,8 +375,8 @@ In the next few chapters, we will introduce exploratory data analysis, and you'l
 Before you move on, we encourage you to think about whether the following questions can be answered with this dataset, and if yes, how you might go about answering them?
 It's okay if your answer is "I'm not sure", we simply want to get your exploratory juices flowing to prime you for what's to come!
 
-1.  Has there every been a year when a visually impaired paralympic gold medal athlete beat the Olympic gold medal athlete?
-2.  When comparing the paralympic and Olympic 1500m gold medal athletes, does Simpson's paradox hold in the Women's division?
+1.  Has there ever been a year when a visually impaired Paralympic gold medal athlete beat the Olympic gold medal athlete?
+2.  When comparing the Paralympic and Olympic 1500m gold medal athletes, does Simpson's paradox hold in the Women's division?
 3.  Is there a biological boundary which establishes a time under which no human could run 1500m?
 
 \clearpage