Friday, August 2, 2013

Unit 3 LTs (draft)

I promised Unit 3 LTs by the end of the week, and I think I made it on time :)  There's nothing like cutting it close.  I had hoped to have units 4 and 5 done by this time as well, but we'll just have to see where I can get.

Here they are.  More thoughts at the bottom!

UNIT 3:  DESCRIPTIVE STATISTICS

Section 3.1:  One-Variable Statistics
3.1A:  I can create plots (dot, box, histogram) to represent data.
3.1B:  I can find and interpret the mean, median, IQR, and standard deviation.
3.1C:  I can compare the shape, spread, and center of data sets using the mean, median, IQR, and standard deviation.

Section 3.2:  Two-Variable Categorical Data
3.2A:  I can create a two-way frequency table for categorical data with two categories.
3.2B:  I can find and interpret relative frequencies (joint, marginal, and conditional) in the context of the data.

Section 3.3:  Two-Variable Quantitative Data
Standards Addressed:  S.ID.6, S.ID.7, S.ID.8, S.ID.9
3.3A:  I can represent data with a scatter plot.
3.3B:  I can find a line of best fit and use it to solve problems in the context of the data.
3.3C:  I can interpret the meaning of the slope and the intercepts.
3.3D:  I can find and analyze the meaning of the residuals and the correlation coefficient.

3.3E:  I can make inferences about correlation and causation.

Thoughts/Notes:
• It makes sense to me to study 1-variable statistics separately, so I'm mostly OK with the organization of 3.1.  We did get a quite decent twitter conversation on whether or not students should be required to calculate standard deviation by hand.  Any further comments on that are welcome.  Thank you to those who already participated and gave me ideas.
• I had planned on doing all two-variable statistics as one section, but there is a lot there!  And it seems weird to me to have 1 standard on categorical data when the rest are on quantitative data.  Hard for me to make that fit well.  There is so much with the quantitative data though that I couldn't combine them.  I hate having 5 LTs in one section (it feels so big) but I feel like I still haven't done the standards justice.  Also I think Section 3.2 being so short will provide an opportunity for a different structure of class.  Maybe we will do a project assessment instead of a test
Please, please, please leave your thoughts in the comments or tweet me (@kathrynfreed) Like I have said with every other unit, I really truly want to make these the best goals I can for my students.  I appreciate all of your feedback whether praising my awesome-ness (not usually) or giving me advice for improvement (usually), I really like how you guys can always make me think more--even when I think my brain is dead!  Thanks for that!

-Kathryn