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:

Ultrasonography

A diagnostic imaging technique that uses high-frequency sound waves to create images of organs and structures inside the body.

Hypercalciuria

A condition characterized by an excessive amount of calcium in the urine.

Calcium

A chemical element essential for living organisms, primarily in bone formation and maintenance, blood clotting, and muscle function.

Polyuria

The production of abnormally large volumes of dilute urine, which can be a sign of various medical conditions.