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

question 56

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.The designers can conclude

• A) there is evidence to suggest a difference between the morning and afternoon classes.
• B) there is evidence to suggest a difference between the old and new lesson designs.
• C) there is evidence to suggest that the lesson design effect in the morning is different from the lesson design effect in the afternoon.
• D) None of these are true.

---

Definitions:

Product Differentiation

A strategy businesses use to distinguish their products from those of competitors in features, quality, or design to attract consumers.

Market Power

The ability of a firm or group of firms to manipulate the price or supply of a good or service in the market to their advantage, often by limiting production or increasing prices.

Product Differentiation

A marketing strategy that businesses use to distinguish their products from similar offerings in the market by varying features, branding, or quality.

Price Competition

A market situation in which companies attempt to win customers by offering lower prices than their competitors.