In children, the leading cause of blindness is

A) cortical visual impairment.
B) retinitis pigmentosa.
C) injuries, athletic and otherwise.
D) brain tumors.


A

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Explain the difference between an R2 and an “adjusted” R2 in a multiple regression analysis.

What will be an ideal response?

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Paula is a materials scientist. She does research on the effects of environmental toxins on various materials samples. She carefully designs these studies and collects data in order to derive theory about how toxins affect these materials. Of the following, Paula's research could best be described as

a. basic. b. correlational. c. ethnography. d. applied.

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A correlation cannot describe data beyond the ______ of data observed in a sample.

A. variance B. range C. sample D. response set

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Stress is

A. the minor irritants of life that don't affect us too much. B. sudden, powerful events that occur quickly and affect many people simultaneously. C. major life events that produce a negative physical and psychological reaction. D. the physical and emotional response to events that threaten or challenge us.

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