One Scale at the Deli Counter of a Local Supermarket

question 19

Multiple Choice

One scale at the deli counter of a local supermarket consistently measures everything that is placed on it exactly one ounce more than its actual weight.An assessment professional would describe this scale as

• A) valid.
• B) reliable.
• C) unreliable.
• D) not properly normed.

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Definitions:

Critical Value

A point on the scale of the test statistic beyond which we reject the null hypothesis; it marks the boundary for deciding whether an observed test statistic is extreme.

Null Hypothesis

A statement used in statistical testing that assumes no significant difference or relationship exists between specified populations.

Standard Error

The standard deviation of the sampling distribution of a statistic, commonly used to measure the precision of the sample mean estimate.

Population Average

The mean of all observations or values in a population.