تم الحل ✓
categoryإحصاء
schoolبكالوريوس
event_available2026-07-15
السؤال
Transcribed Image Text:
Sophia who took the Graduate Record Examination (GRE) scored 160 on the Verbal Reasoning
section and 157 on the Quantitative Reasoning section. The mean score for Verbal Reasoning
section for all test takers was 151 with a standard deviation of 7, and the mean score for the
Quantitative Reasoning was 153 with a standard deviation of 7.67. Suppose that both
distributions are nearly normal.
(a) What is Sophia's Z-score on the Verbal Reasoning section? On the Quantitative Reasoning
section? Draw a standard normal distribution curve and mark these two Z-scores.
(b) What do these Z-scores tell you?
(c) Relative to others, which section did she do better on?
(d) Find her percentile scores for the two exams. (This is the percent of other test takers she did
better than.)
(e) What percent of the test takers did better than her on the Verbal Reasoning section? On the
Quantitative Reasoning section?
(g) Explain why simply comparing raw scores from the two sections could lead to an incorrect
conclusion as to which section a student did better on.
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