For #2, and #6 below, DC writes prior to question (2) In a previous activity you learned about dotplots, graphical displays for quantitative data where each dot represents an observation. Dotplots are useful for visualizing distributions when the data set is small. This is true. Dotplots first appear in Corequisite Activity 2A as an exploration of using a random number generator to select a random sample from a finite population, and calculate the arithmetic mean. Students who don’t see coreq pages see their instructor use the tool to make a dotplot in WTK 2A (then are instructed to sketch the plot in their notebook)

DC sometimes takes an LO from a WTK and has students “pre-practice” it before joining the credit-bearing class meeting so that they’ll have enough familiarity with a challenging skill to persist through the activity. The credit bearing portion (WTK and FC) often moves faster than a co-req student desires or needs it to. This page is such a coreq, practicing upcoming material in advance.

Prerequisites to complete Corequisite Support Activity, What to Know, and Forming Connections in Visualizing Quantitative Data

Corequisite Support Activity (source: 1-5 implied prior knowledge in content; 6-7 specified as prior knowledge in DC instructor page)

1. Create a frequency table from a data set by hand. <—This is an LO for this page
2. Create a dotplot from a frequency table using technology. <– this is included in #6, 
3. Create a histogram from a frequency table using technology. <— this is included in #6
4. Understand the difference between a bar graph and a histogram.<— This is an LO for this page
5. Create a histogram from a data set using technology. <— This is an LO for this page.
6. Use technology to make plots to visualize distributions of quantitative variables <–See note above. This is an LO for the following WTK
7. Use a plot to describe features of a distribution <– This is an LO for the following WTK activity

What to Know (source: implied prior knowledge in content)

1. Identify a variable as quantitative or categorical <– This is an LO for this page
2. Identify appropriate visual displays for the distribution of a categorical variable <– This is an LO for this page

Forming Connections (source: WTK LOs explicitly given in DC instructor page in-class activity)

1. Identify quantitative variables and the plots used to visualize their distributions.
2. Use technology to make a plot of the distribution of a quantitative variable.
3. Use a histogram to describe a distribution.
4. Identify how the bin width affects the histogram.
5. Use a dotplot to describe a distribution.
6. Identify a population and sample and explain limitations on the scope of the analysis based on the sample data.