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Showing posts from October, 2025

Latitude and longitude hide and seek

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Starting with the solstices and equinoxes presentation took too much time at 24 minutes. I ran out of time in the latitude and longitude introduction at 11:42 and had to try to pack GPS Essentials into the last eight minutes. The prime meridian was not well covered, time ran out. Solstice should perhaps move back to Friday perhaps displacing the traditional navigation play list. At the hide. Latitude: N 06° 54.509'   Longitude: E 158° 09.493'  Just below the dining hall, but I entered from the Daniel store side and crossed two valleys to reach this location. Austin was lead on the first and only group to find me group. Austin arrived at the hide by 12:15, a very fast find. He was careful to not be satisfied until all of the digits matched.  Kayla and Vandasia were part of the lead group, Vandasia was navigating with her own phone. Tayshaun and Valencia were also in the first group. Once we left the ...

8.2 Five marbles standard error of the mean

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Opened with working 7.3 homework.  9:13 and marbles were distributed. Marbles were pre-sorted. With the marbles distributed, roll was taken. No marbles were distributed after the roll. 9:16 and the third student. All 75 marbles distributed among 15 students were massed by  9:28.  Spreadsheet This term the 95% confidence intervals for all 15 samples captured the population mean. The population mean was also surprising: 5.1000 grams. Mathematically no more surprising than 5.1417, but for humans, surprising.