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

question 63

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.
-True or False: 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:

Carbanion

A negatively charged ion (anion) that consists of a carbon atom having a pair of non-bonded electrons.

Free Radical

Highly reactive atoms or molecules with an unpaired electron, involved in various chemical reactions.

Carbene

A highly reactive molecule featuring a carbon atom with two non-bonded electrons, making it very reactive.

Intermediates

Reactive species that are formed during the chemical reactions and lie in the reaction pathway between the reactants and the final products.