(a) To see what values of the sample percentage would be expected if the school percentage was 30, she decides to use 1,200 beads to represent the population of 1,200 students. She wonders if it would be surprising to see a sample percentage of 24 or less if the school percentage is Because the sample percentage is (12/50)100 = 24%, Stella thinks that fewer than 30 percent of the students at her school favor an extended school day. Only 12 of the students in the sample favored an extended school day. To investigate, she selected a random sample of 50 students from the 1,200 students at her school and asked each student in the sample if he or she favors an extended school day.

For more information, refer to the SpaceClaim Online Help.Stella saw the following headline in a national newspaper: “30 Percent of High School Students Favor Extended School Day.” She wondered if the percentage of students at her school who favor an extended school day was less than 30 percent. Annotation dimensions can also be used to drive model changes. Use the Dimension tool on the Detail tab to create dimensions that measure length, angle, and other characteristics. Click the bottom of the cylinder to create a temporary dimension that measures the height.Creating dimensions for reference is done with SpaceClaim Annotation tools. To create a dimension that measures the height of the cylinder, click the Ruler icon in the Options panel or on the mini-toolbar. For example, when using the Pull tool to change the height of a cylinder, a dimension appears that shows the size of the change: Usually dimensions appear on screen when using a tool to make an edit. Changes to a model are done with tools that use dimensions to define the size of a change. First, determine if you are dimensioning the model to indicate size and proportion or, if you want to drive changes to the model with dimensions.

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