Name and describe the three principles of data collection.

Ms. Pilai has given her class their final exam and has discovered that their scores formed a perfect normal curve, with a standard deviation of 10 • If the mean score of the test was 72, what percentage of students scored between 62 and 82? • What range of scores would be within three deviations of the mean? • What percentage of the scores would be within two standard deviations of the mean?

Describe how each of the following types of evidence are used to determine whiter there is an intellectual decline as people age. • Evidence from cross-sectional studies • Evidence from longitudinal studies

Explain whether each of the following comparisons demonstrates the influence of genetics or of environment on intelligence. • The correlation of intelligence test scores for identical twins raised together is abut +85. For identical twins raised apart, the correlation is about +72. • The correlation of intelligence test scores for identical twins raised together is about +85. For fraternal twins raised together, it is about +60.

Explain three reasons why racial differences in intelligence might be caused by environmental factors.

Luis is a Mexican-American high school student with a 3.8 GPA. He recently completed his SAT in a room with a Whit proctor and on all White group of students. His score was much lower than he predicted based on the practice exam, he took during his English class at his largely Hispanic high school. Explain how each of the following may have contributed to his lower score: • Bias • Stereotype threat

What is the difference between subjective and objective data?

Explain the difference between objective data and subjective data.

What does Hermann Ebbinghaus’ forgetting curve show about the nature of storage decay? a. The rate of forgetting increases as time goes on. b. The rate of forgetting decreases as time goes on. c. The rate of forgetting does not change as time goes on. d. The rate of forgetting varies according to the motivation of the learner. e. The rate of forgetting varies according to the emotional state of the learner.

Describe the production of the vitreous humor.

Using exponential smoothing, calculate the forecasts. The old average for month $3$ was $96$ and a = $0.4$. What is the difference between the two forecasts for month $11$?

The text discusses four principles of forecasting. Name and describe each.

Troy has decided to move from the United States to Japan. Describe two cultural elements that will be different for Troy when he moves.