Quiz 2

Please see the attached picture of the bell curve chart please find attached the textbook and other attachments Quiz 2 is based on Chapters 4 and 5 of Salvia et al. (2017). Also review the instructional videos and PPts pertaining normal distribution and standard deviation from Session 2. Use in-text citations as appropriate to support your answers. PDF document Quiz 2 100 points Quiz 2 is based on Chapters 4 and 5 of Salvia et al. (2017). Also review the instructional videos and PPts pertaining normal distribution and standard deviation from Session 2. Use in-text citations as appropriate to support your answers. Text X  Standard deviation is 15.  Mean = 100 1. Label the mean on the bell curve above. Label the X-axis on the bell curve above to indicate 1, 2, and 3 standard deviations from the mean (20 points). 2. Label the curve above to show where each of the following standard scores would fall (10 points): • Student A: 97 • Student B: 55 • Student C: 75 • Student D: 80 3. The standard scores below represent a subset of student scores for Test X. Explain where each of the standard scores fall in relation to the mean (e.g., within 1SD of the mean; 2SD below the mean) (10 points) • Student A: 95 • Student B: 55 • Student C: 75 • Student D: 80 4. According to the empirical rule, what percentage of scores (referring to scores for all test takers) for Text X would fall within (a) 1SD of the mean? (b) within 2SD of the mean? (10 points) 5. The confidence level for the above scores is 95%, yielding a confidence interval of 87 – 103 for Student A, who earned a standard score of 95. Given the above information, explain Student A’s score to that student’s parents. In your explanation, be sure to discuss why Student A’s score of 95 is presented within a range (87 – 103) rather than as just a single score. To answer this question, revisit the discussion on confidence interval within the textbook and be sure to incorporate the appropriate academic language (from the course text) in your explanation (20 points). 6. A 10-year-old student earned an age equivalent of 11.5 and a grade equivalent of 6 on Text X. Using the appropriate academic language from the course text, respond to the following questions (a) How would you explain these developmental scores to the child’s parent? (b) What cautions would you provide to the parent about interpreting these scores? (20 points) 7. What is a raw score? What information does it provide? Why do we convert raw scores? What kinds of scores do they convert to? (10 points)