I Trying to Predict Weekly Sales with a Standard Error

question 127

Multiple Choice

i. Trying to predict weekly sales with a standard error of estimate of $1,955, we would conclude that
68 percent of the predictions would not be off more than $1,955, 95 percent would not be off by
More $3,910, and 99.7 percent would not be off by more than $5,865.
ii. Approximately 95% of the values lie within two standard errors of the regression line.
iii. The smaller the sample, the smaller the possible error as measured by the standard error of
Estimate.

• A) (i), (ii), and (iii) are all correct statements.
• B) (i) and (ii) are correct statements but not (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (ii) and (iii) are correct statements but not (i).
• E) (i), (ii), and (iii) are all false statements.

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Definitions:

Independent Variable

A variable in an experiment that is manipulated to observe its effect on the dependent variable.

Investigator

A person who carries out a systematic search or research, especially in order to discover new information or reach a new understanding.

Gender Identity

An individual's personal sense of their own gender, which may or may not correspond with their sex assigned at birth.