A group of scientists studied the adhesion of various biofilms to solid surfaces for possible use in environmental technologies. Adhesion assay is conducted by measuring absorbance at A590. If the scientists want the confidence interval to be no wider than 0.55 dyne-cm2 at 94% confidence interval, how many observations should they take? Assume that the standard deviation is known to be 0.66 dyne-cm2. O 16 O 32 O 39 O 18 O 25 O 21

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A group of scientists studied the adhesion of various biofilms to solid surfaces for possible use in environmental technologies. Adhesion assay is conducted by measuring absorbance at A590. If the scientists want the confidence interval to be no wider
than 0.55 dyne-cm2 at 94% confidence interval, how many observations should they take? Assume that the standard deviation is known to be 0.66 dyne-cm2.
O 16
O 32
O 39
O 18
O 25
O 21
Transcribed Image Text:A group of scientists studied the adhesion of various biofilms to solid surfaces for possible use in environmental technologies. Adhesion assay is conducted by measuring absorbance at A590. If the scientists want the confidence interval to be no wider than 0.55 dyne-cm2 at 94% confidence interval, how many observations should they take? Assume that the standard deviation is known to be 0.66 dyne-cm2. O 16 O 32 O 39 O 18 O 25 O 21
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