The average thickness of books in the library shelf is 8.3 cm the standard deviation is...
Homework Answers
| mean μ= | 8.3 |
| standard deviation σ= | 0.6000 |
as top 20% are at 80th percentile:
| for 80th percentile critical value of z= | 0.84 | ||
| therefore corresponding value=mean+z*std deviation= | 8.80 | ||
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