SCENARIO 15-4
the Superintendent of a School District Wanted to Predict

question 24

Short Answer

SCENARIO 15-4
The superintendent of a school district wanted to predict the percentage of students passing a sixth-
grade proficiency test. She obtained the data on percentage of students passing the proficiency test
(% Passing), daily mean of the percentage of students attending class (% Attendance), mean teacher
salary in dollars (Salaries), and instructional spending per pupil in dollars (Spending) of 47 schools in
the state.
-Referring to Scenario 15-4, which of the following predictors should first be dropped to remove collinearity? a) $X _ { 1 }$
b) $X _ { 2 }$
c) $X _ { 3 }$
d) None of the above

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Definitions:

Sampling Distribution

The distribution of probabilities for a certain statistic, obtained from a random sample.

Sample Statistic

A numerical measure that describes an aspect of a sample of a population.

Probability Samples

Samples chosen in such a way that every member of the population has a known, non-zero chance of being included.

Convenience Sampling

A sampling technique where subjects are selected because of their convenient accessibility and proximity to the researcher.