TABLE 9-9 The President of a University Claimed That the Entering Class

question 134

Short Answer

TABLE 9-9
The president of a university claimed that the entering class this year appeared to be larger than the entering class from previous years but their mean SAT score is lower than previous years. He took a sample of 20 of this year's entering students and found that their mean SAT score is 1,501 with a standard deviation of 53. The university's record indicates that the mean SAT score for entering students from previous years is 1,520. He wants to find out if his claim is supported by the evidence at a 5% level of significance.
-Referring to Table 9-9, what critical value should the president use to determine the rejection region?

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Definitions:

Spill Distance

The measure of how far a liquid or granular material can spread or disperse upon being spilled, often considered in environmental hazard planning.

Groundwater

Water found underground within the spaces between soil particles and cracks within rock structures.

Monitoring Aquifers

The process of observing and tracking the quality, quantity, and movement of water within underground layers of water-bearing rock or materials.

Hazardous Wastes

Waste materials that are dangerous or potentially harmful to human health or the environment, often generated by industries and require special disposal techniques.