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:

Applied Voltage

The electrical potential difference deliberately introduced to a circuit or device.

Capacitive Reactance

The opposition that a capacitor offers to alternating current (AC), which decreases as the frequency of the AC increases, calculated as 1/(2πfC) where f is the frequency and C is the capacitance.

Series Connection

A circuit configuration in which components are connected end-to-end, providing a single path for current flow.

Frequency Source

A device or circuit component that generates an oscillating electrical signal of a specific frequency.