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For safety purposes, a circus requires that all employees who perform acrobatic stunts weigh between 120 and 140 pounds. Today, Vivian, a long-time acrobat for the circus steps on a scale for a weight-check. The scale says that she weighs 114 pounds and thus is not within the required 120-140 pound range. Vivian is surprised and upset and asks to be re-weighed. When she steps on the scale again, it says she weighs 114 pounds. When Vivian checks her weight a third time, the scale again says she weighs 114 pounds. Which of the following statements most accurately describes the reliability and validity of the scale?
a. High reliability and high validity
b. Unknown reliability and low validity
c. Low reliability and high validity
d. High reliability and unknown validity

Sagot :

anthougo

Answer:

The statement that most accurately describes the reliability and validity of the scale is:

a. High reliability and high validity

Explanation:

a) Data and Calculations:

Standard acrobatic stunts' weights = 120 and 140 pounds range

Vivian's weight-check results = 114 three times

b) Reliability entails the consistency of a measure for getting the same result after every measurement.  Validity denotes the accuracy of a measure, especially since the measurement obtained is what it is supposed to measure.  Therefore, tests that are highly reliable are said to be highly valid and vice versa.

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