PSYC 212 Lecture 9: Midterm Review
3 Nov 2016
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Weight loss (lbs): 2 8 9 9 10 11 12 12 17. Median: 2 8 9 9 10 11 12 12 17. Mode: 2 8 9 9 10 11 12 12 17. Sd= (x-m)2/(n-1) (x-m): -8 -2 -1 -1 0 1 2 2 7 (x-m)2: 64 4 1 1 0 1 4 4 49. Yes, 2 is an outlier, it is less than 3. 25. 68% of people have a z-score between + 1 standard deviation from the mean. 95% of people have a z-score between + 2 standard deviations from the mean. 99. 7% of people have a z-score between + 3 standard deviations from the mean. 2 y c n e u q e r. 100-89. 44 = 10. 56% chance someone will lose more than 15 lbs. Always round to 2 decimals t gets rounded to 3 decimals p is always > or < . 05. Se= sd/ n = 4/ 9 = 1. 33 t= m- /se t= 10-12/1. 33 t= -1. 50.
