danaleeling

With no laboratory scheduled for this week, the class will be exploring the physics of playthings. Failure is an option, and the less I know about the system the better. In Playthings I asked the class if mass will be related to velocity for a flying disk. The consensus appeared to be that more massive disks should be faster - within reason. These are toy disks after all, not discus disks. A set of disks including a flying ring were available ranging from 33 grams to 172 grams. Alexander, Kiora The students chose a ten meter throwing pitch just north of the generator. Sanjay, Alexander Groups of three to four were necessary: a thrower, a catcher, a timer, and a data recorder. One group had the timer record data. After data was gathered, I entered data from the three groups into a single table to perform a meta-study. With an r of 0.182 for a linear regression, there was no relationship to speak of.  This was confirmed in a post-hoc analysis.  A slope of zero is within the 95% ...

Page views are a proxy for engagement on the Instructure Canvas platform. As seen in prior term, engagement drops after the midterm. The week eight spike was associated with midterm. The recent uptick in week eleven was not seen in prior terms.  There are roughly 82 unpublished courses in Canvas. The caveat is that courses which were transferred to another instructor during the term would still be listed here as being unpublished but may have no students in the course. Thus the 82 should be seen as an upper limit on the number of unpublished courses. This particular chart derives from provisioning tables for users and enrollments along with the unpublished courses report in Canvas. These were then joined using Looker Studio, formerly Data Studio. The score distribution across the college is as seen above. At present there are 5553 current scores with a mean of 74.32 and a median score systemwide of 78.08.  Dashboard Learning outcomes are still be tracked, although the number b...

Once again I overlooked consulting my prior notes - week eleven is some sort of local minima in the term. Staring at the Oregon blueberries in Ace Office something told me not to buy those, but I could not remember what . And in A1 Mart I overlook purchasing the pears and mangos . I did realize that bowls would work better than cupcake cups , but that was a decision made without consulting my own notes .  This term I realized I needed a hesperidium. And my notes reminded me to remove the width and span style tags in the main fruit table so that the table would reflow to the screen size of mobile devices. Simple fruits: single ovary from single flower Fleshy fruit...

Week eleven began with the United Nations Day holiday, dropping the Monday lead optics video. Wednesday drove straight into reflection and refraction using the mirror cart rolled to the front of the classroom. The class followed the usual arc into lenses. For the lab on Thursday I pulled graduated cylinders from the cabinets - a stash I had not known about prior to this term. I upped the number of tall cylinders, which provided better data, and dropped the number of beakers. The refracted penny was kiboshed due to the pans being too brittle. There was little loss in this choice.  Jasmine, Sanjay, and Kamaloni "Kai" The 8:00 section started a little late due to students rolling in late.  Following suggestions from prior terms I omitted all mention of the mathematical model to be used, and made sure that the word slope did not appear on the board. This was the board at the end of the 8:00 lab. I put no equation on the board. The students obtained linear data. I told them to pic...

With a second sunny day in a row, the obvious choice was to teach the students to make a better paper aircraft for distance of flight.  Shi Ann's plane can be seen at the extreme upper left The darts tended to embed into the soft soil Although hard to see, the planes generally flew further On the ground data values were entered using the Tripltek tablet Spreadsheet Calculations were then made on the Smartboard in A204. For 11.2 only the p-value was calculated. Cohen's d will come up in 11.3 . The p-value is less than our alpha of 0.05 therefore we reject the null hypothesis of no difference in the sample means. The new design flew statistically significantly further. Note that the test remains a two-tail test to retain the relationship with confidence interval hypothesis testing. This course takes the position that if one cannot get a significant difference on a two-tailed test, then moving to one-tailed test is an error. One tailed tests should not be done.  The type 3 in th...