A Student Scored at the 88^th Percentile in Mathematics Achievement

question 10

Multiple Choice

A student scored at the 88^th percentile in mathematics achievement on the national assessment. Of the following, which is an appropriate interpretation of the student's score?

• A) His t score is approximately 58.
• B) His z score less than 2.
• C) His stanine score is approximately 6.
• D) His score is higher than the mean.

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Definitions:

Test Statistic

A value calculated from sample data during a hypothesis test used to make a decision about the null hypothesis.

Null Hypothesis

A statement of no effect or no difference, used as a starting assumption for statistical significance testing.

Grand Mean

The mean of means, calculated by taking the average of several group means.

Completely Randomized

A design in experiments where all subjects have an equal chance of being assigned to any group or treatment.