4. From the data given below, find the number of items. Er = 90 r = (0.5 Exy = 120 Oy = 8 %3D %3D (where x and y are deviations from arithmetic average).

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter11: Data Analysis And Displays
Section: Chapter Questions
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4. From the data given below, find the number of items.
Er = 90
r = 0.5 Exy = 120
Oy = 8
(where x and y are deviations from arithmetic average).
Transcribed Image Text:4. From the data given below, find the number of items. Er = 90 r = 0.5 Exy = 120 Oy = 8 (where x and y are deviations from arithmetic average).
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