Exhibit 8-5 A Random Sample of 64 SAT Scores of Students Applying

question 12

Multiple Choice

Exhibit 8-5
A random sample of 64 SAT scores of students applying for merit scholarships showed an average of 1400 with a standard deviation of 240.
-Refer to Exhibit 8-5. The "t" value for this interval estimation is

• A)1.96
• B)1.998
• C)1.64
• D)1.28

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Definitions:

Extreme

Relating to values that are farthest from the mean or median in a data set, often considered outliers.

Z Score

A calculation used to express the difference of a particular value from a group's mean, in terms of how many standard deviations away it is.

T Score

A standardized score that indicates how many standard deviations an element is from the mean of its distribution.

Z Scores

Standard scores indicating how many standard deviations an element is from the mean.