Michael Lanstrum | Cuyahoga Community College (original) (raw)
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This article revisits the Equal Sums problem and considers all possible solutions. Depending on t... more This article revisits the Equal Sums problem and considers all possible solutions. Depending on the row/column total, various solutions are possible. Sometimes the value of E is unique, sometimes E is not, and in other cases a value of E is not possible. Looking at all possible row/column totals, surprisingly there is only one value that E cannot represent.
Real World Learning Objects Resource Library (Online …, Jan 1, 2005
This RWLO describes a lesson plan that instructs students on how to create a confidence interval ... more This RWLO describes a lesson plan that instructs students on how to create a confidence interval based on the historical snowfall of Chardon, Ohio (41º 34' 45" North, 81º 12' 16" West). The City of Chardon website includes the historical snowfall (updated monthly) going back to 1952. The RWLO begins with a review of calculating the mean and standard deviation using the traditional formulas with a subset of the historical data. This is followed by using a "short-cut" formula to calculate the standard deviation of the entire data set and create a confidence interval. By having students work in groups it is possible to calculate the mean and standard deviations for a variety of 10-year periods within the data and a confidence interval at different levels. By debriefing at the beginning of the next class we can use all of this information to show students how only using part of the data can skew results and how the confidence interval changes when the level changes.
Teaching For Success, Jan 1, 1996
An academic directory and search engine.
Ohio Journal of School Mathematics, Jan 1, 1993
An academic directory and search engine.
This article revisits the Equal Sums problem and considers all possible solutions. Depending on t... more This article revisits the Equal Sums problem and considers all possible solutions. Depending on the row/column total, various solutions are possible. Sometimes the value of E is unique, sometimes E is not, and in other cases a value of E is not possible. Looking at all possible row/column totals, surprisingly there is only one value that E cannot represent.
Real World Learning Objects Resource Library (Online …, Jan 1, 2005
This RWLO describes a lesson plan that instructs students on how to create a confidence interval ... more This RWLO describes a lesson plan that instructs students on how to create a confidence interval based on the historical snowfall of Chardon, Ohio (41º 34' 45" North, 81º 12' 16" West). The City of Chardon website includes the historical snowfall (updated monthly) going back to 1952. The RWLO begins with a review of calculating the mean and standard deviation using the traditional formulas with a subset of the historical data. This is followed by using a "short-cut" formula to calculate the standard deviation of the entire data set and create a confidence interval. By having students work in groups it is possible to calculate the mean and standard deviations for a variety of 10-year periods within the data and a confidence interval at different levels. By debriefing at the beginning of the next class we can use all of this information to show students how only using part of the data can skew results and how the confidence interval changes when the level changes.
Teaching For Success, Jan 1, 1996
An academic directory and search engine.
Ohio Journal of School Mathematics, Jan 1, 1993
An academic directory and search engine.