8.2 Five marbles standard error of the mean

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.






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