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BritishGent BritishGent
wrote...
Posts: 1205
6 years ago
If the mean score on a stress scale is 5, the standard deviation is 2, and the distribution is normal, the percentage of people who would obtain scores between 5 and 9 is
A) 34% + 34% = 68%.
B) 34%.
C) 50%.
D) 14% + 34% = 48%.
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2 Replies
Using the textbooks:

Statistics for Psychology, 5th Edition (Aron)
Measurement and Evaluation in Psychology and Education, 8th Edition (Thorndike)
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ErhardtErhardt
wrote...
Top Poster
Posts: 838
6 years ago
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BritishGent Author
wrote...
6 years ago
Thanks to you I passed the courses with an A
Using the textbooks:

Statistics for Psychology, 5th Edition (Aron)
Measurement and Evaluation in Psychology and Education, 8th Edition (Thorndike)
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