Use the Data in the Given Table and the Corresponding

question 7

Essay

Use the data in the given table and the corresponding Minitab display to test the hypothesis. The
following Minitab display results from a study in which three different teachers taught calculus
classes of five different sizes. The class average was recorded for each class. Assuming no
effect from the interaction between teacher and class size, test the claim that the teacher has no
effect on the class average. Use a 0.05 significance level. $$\begin{array} { l r c r c c } \text { Source } & D F & \boldsymbol { S S } & \boldsymbol { M S } & \boldsymbol { F } & \boldsymbol { p } \\\text { Teacher } & 2 & 56.93 & 28.47 & 1.018 & 0.404 \\\text { Class Size } & 4 & 672.67 & 168.17 & 6.013 & 0.016 \\\text { Error } & 8 & 223.73 & 27.97 & & \\\text { Total } & 14 & 953.33 & & &\end{array}$$

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Definitions:

Common Stock

A type of security that signifies ownership in a corporation and represents a claim on part of the corporation's profits and assets.

Company

An organization engaged in commercial, industrial, or professional activities, either for profit or not-for-profit.

Preferred Stock

A category of corporate share that ranks above common stock in terms of asset and income claims, typically associated with predetermined dividend payments.

Par Value

The nominal value of a bond, stock, or coupon as stated in the financial instrument.