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

question 74

True/False

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, the evidence proves beyond a doubt that the mean SAT score of the entering class this year is lower than previous years.

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Definitions:

Proportion

A part, share, or number considered in comparative relation to a whole, often expressed as a fraction or percentage.

Confidence Interval

A series of values, taken from sampled data, believed to cover the value of a hidden population parameter.

Defective Fuses

Products in a batch of fuses that do not meet the required quality or performance standards.

Normal Distribution

A continuous probability distribution characterized by a symmetric bell-shaped curve, representing random variables with mean and variance.