Each Portion of the SAT Exam Is Designed to Be

question 129

Short Answer

Each portion of the SAT exam is designed to be normally distributed such that it has a population standard deviation of 100 and a mean of 500. However, the mean has changed over the years as less selective schools began requiring the SAT, and because students later began to prepare more specifically for the exam. Construct a 90% confidence interval for the population mean from the following eight scores from the math portion, using the population standard deviation of 100: 450, 660, 760, 540, 420, 430, 640, and 580.

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Definitions:

Cones

Photoreceptor cells in the retina of the eye responsible for color vision and functioning best in relatively bright light.

Rods

Photoreceptor cells in the retina of the eye that are sensitive to low light levels and contribute to black-and-white vision.

Trichromatic Theory

The theory of color vision suggesting that three types of cones in the retina each make a maximal chemical response to one of three colors—blue, green, or red.

Color Sensitive Cones

Photoreceptor cells in the retina of the eye that are responsible for color vision under bright light conditions.