繼續研讀 Applied Statistics for The Behavioral Sciences

•  10:30-15:00 
• 複習第4章 1) Determining Proportions 已知兩個分數，或兩個百分位，求中間分數所佔百分比, 2) Determining Percentiles 已知百分位，求對應的分數, 3) Determining Percentile Ranks 已知分數，求對應的百分位。
• 繼續第4章作業，完成第2-3題。
• 2. Assume that a set of 200 scores is normally distributed with a mean of 60 and a standard deviation of 12.
• a. What are the z scores corresponding to the raw scores of 76, 38, and 50?
• b. How many scores lie between the value of 48 and 80? 65 and 75? 34 and 52?
• c. How many scores exceed the values of 80, 60, and 40?
• d. How many scores are less than the values of 35, 50, and 75?
• e. Find P35, P80, PR55, and PR70.
• 3. The norms for a standardized mathematics test, assumed to be normally distributed, are as follows:
• National norms: mean=75, standard deviation=12
• Large-city: mean=68, standard deviation=15
• John has a score of 80, and Mary has a score of 65. What are their percentile ranks in terms of the national norms? in terms of the large-city norms?
• Table C.1 Areas under Standard Normal Curve for Values of z. 
• z Standard score
• Area between mean and z, 
• Area beyond z, 
• Ordinate
• Table C.2 Standard Scores (or Deviates) Corresponding to Divisions of the Area under the Normal Curve into a Larger Proportion (B)
• B, The larger area
• z, Standard score
• 解 2a
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