Exhibit 7-7: a Group of Curriculum Designers Has Developed a New

question 3

Multiple Choice

Exhibit 7-7: A group of curriculum designers has developed a new system for teaching phonics to young children.They randomly selected 24 kindergarten students to receive either the old phonics method or the new phonics method.The designers realized that kindergartens have morning and afternoon classes, so they wanted to build this factor into the research design.The following is the mean, standard deviation, and number for each group.
$\begin{array}{lll}\text { Morning } & {\text { Old }}{} & {\text { New }}{} \\ & 16.33 & 13.50 \\ &1.03 & 2.74 \\& 6 & 6 \\ \text { Afternoon } & 13.17 & 16.83 \\ & 3.55 & 2.14 \\ & 6 & 6\end{array}$
The following is an incomplete summary table of the analysis of variance:
$\begin{array}{ll}\underline { \text { Source }} & \underline { \text { SS }} & \underline { \text { df }} & \underline { \text { MS}} & \underline { \text { F}}\\\text { Time of Day } & 0.042 \\\text { Lesson Design } & 1.042 \\\text { Interaction }\\\text { Error } & 128.500 \\\text { Total } & 102950\end{array}$
-Refer to Exhibit 7-7.What is the F value for Lesson Design?

• A) .006
• B) .162
• C) 9.864
• D) None of these are true.

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Definitions:

Income Elasticity

A measure of how much the demand for a good or service changes in response to changes in consumer income.

Demand Increase

A situation where the quantity of a product or service that consumers are willing and able to buy at a given price rises.

Price Elasticity

The sensitivity measure of demand for a good relative to its price changes.

Demand Curve

It illustrates the relationship between the price of a good or service and the quantity demanded for a given period, assuming all other factors are constant (ceteris paribus).