A School Has Three Tenth Grade Classes

question 7

Essay

A school has three tenth grade classes. All three classes took the same physics test. The mean scores for the three classes were 75, 71, and 78. Can the mean score for all tenth grade students be found by taking the mean of 75, 71, and 78? Explain.

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Definitions:

Scalawags

Southern white Republicans—some former Unionists—who supported Reconstruction governments.

Non-slaveholding White Farmers

describes white farmers in the southern United States before the Civil War who did not own slaves, often working their own land and living in economically marginal conditions.

Southern Upcountry

A term referring to the inland regions of the southern United States, often characterized by its geography and distinct cultural or economic identity.

Radical Reconstruction

The period after the American Civil War when the federal government took extensive measures to reintegrate and rebuild the Southern states, and to grant rights to freed slaves.