A Researcher Wished to Evaluate the Operating Life of a Certain

question 62

Short Answer

A researcher wished to evaluate the operating life of a certain brand of storage battery. A group of 30, brand-new batteries was selected and placed in 30 identical automobiles. The lights in each automobile were then turned on (without running the engines), and the length of time before the batteries were fully discharged (lights went out) was recorded. The scores, in hours, were: 15, 10, 20, 18, 18, 11, 11, 11, 11, 12, 12, 12, 10, 9, 9, 8, 9, 9, 11, 11, 11, 15, 12, 12, 12, 10, 12, 12, 15, 12.
-Calculate the range.

Comprehend the concepts of reliability and validity in psychological testing.

Grasp the calculation and interpretation of intelligence quotient (IQ) scores.

Recognize the impact of cultural and age factors on intelligence testing.

Identify the role and contributions of key figures in the development of intelligence testing.