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Probability and Statistics for Engineers and the Scientists | 9th Edition | ISBN: 9780321629111 | Authors: Ronald E. Walpole; Raymond H. Myers; Sharon L. Myers; Keying E. Ye
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A study of the relationship between age and various visual

Chapter 2, Problem 49E

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QUESTION:

A study of the relationship between age and various visual functions (such as acuity and depth perception) reported the following observations on the area of scleral lamina (mm2) from human optic nerve heads (“Morphometry of Nerve Fiber Bundle Pores in the Optic Nerve Head of the Human,” ?Experimental Eye Research, 1? 988: 559–568): a.?? alculate ?xi and ?x2i. b. ?Use the values calculated in part (a) to compute the sample variance ?s?2 and then the sample standard deviation ?s.

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QUESTION:

A study of the relationship between age and various visual functions (such as acuity and depth perception) reported the following observations on the area of scleral lamina (mm2) from human optic nerve heads (“Morphometry of Nerve Fiber Bundle Pores in the Optic Nerve Head of the Human,” ?Experimental Eye Research, 1? 988: 559–568): a.?? alculate ?xi and ?x2i. b. ?Use the values calculated in part (a) to compute the sample variance ?s?2 and then the sample standard deviation ?s.

ANSWER:

Answer: Step1: Given, a study of the relationship between age and various visual functions (such as acuity and depth perception) reported the given observations on the area of scleral lamina (mm2) from human optic nerve heads 2.75 2.62 2.74 3.85 2.3 2.7 3.9 4.2 3.88 4.33 3.4 4.52 2.4 3.6 2.78 3.56 3.01 4 4 3 1 6 3 5 Step2: a). We have to calculate xi and x2i. X x2 2.75 7.5625 2.62 6.8644 2.74 7.5076 3.85 14.8225 2.34 5.4756 2.74 7.5076 3.93 15.4449 4.21 17.7241 3

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