A CÍ is desired for the true average stray-load loss u (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. that stray-load loss is normally distributed witho = 2.9. (Round your answers to two decimal places.) (a) Compute a 95% CI for u when n = 25 and x = 51.2. watts (b) Compute a 95% CI for u when n = 100 and x = 51.2. watts (c) Compute a 99% CI for u when n = 100 and x = 51.2. watts (d) Compute an 82% CI for u when n = 100 and x = 51.2.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 93E
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A CI is desired for the true average stray-load loss u (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. Assume
that stray-load loss is normally distributed witho = 2.9. (Round your answers to two decimal places.)
(a) Compute a 95% CI for u when n = 25 and x = 51.2.
watts
(b) Compute a 95% CI for u when n = 100 and x = 51.2.
watts
(c) Compute a 99% CI for u when n = 100 and x = 51.2.
watts
(d) Compute an 82% CI for u when n = 100 and x = 51.2.
watts
(e) How large must n be if the width of the 99% interval for u is to be 1.0? (Round your answer up to the nearest whole number.)
n =
You may need to use the appropriate table in the Appendix of Tables to answer this question.
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Transcribed Image Text:A CI is desired for the true average stray-load loss u (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. Assume that stray-load loss is normally distributed witho = 2.9. (Round your answers to two decimal places.) (a) Compute a 95% CI for u when n = 25 and x = 51.2. watts (b) Compute a 95% CI for u when n = 100 and x = 51.2. watts (c) Compute a 99% CI for u when n = 100 and x = 51.2. watts (d) Compute an 82% CI for u when n = 100 and x = 51.2. watts (e) How large must n be if the width of the 99% interval for u is to be 1.0? (Round your answer up to the nearest whole number.) n = You may need to use the appropriate table in the Appendix of Tables to answer this question. Need Help? Read It
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