(a) Find a 90% confidence interval for the mean number of polyester microfibers per 250 mL of beach sediment. Round your answers to two decimal places. The 90% confidence interval is to (b) What is the margin of error? Round your answer to two decimal places. margin of error = the absolute tolerance is +/-0.05

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n Assighiment
DURCES
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(c) If we want a margin of error of only ±0.5 with 90% confidence, what sample size is needed?
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Round your answer up to the nearest integer.
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sample size =
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the absolute tolerance is +/-3
ection 1-CI,
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ection 1-D,
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Transcribed Image Text:n Assighiment DURCES ections ion 1-CI, Eion 1-CI, (c) If we want a margin of error of only ±0.5 with 90% confidence, what sample size is needed? tion 1-CI, Round your answer up to the nearest integer. tion 1-CI, sample size = ction 1-CI, the absolute tolerance is +/-3 ection 1-CI, Click if you would like to Show Work for this question: Open Show Work ection 1-CI. ection 1-D, Section 1-D, By accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by your instruci Section 1-D, Que Section 1- e 046 Section 1- Le 047 Section 1- se 048 Section 1- se 050 - Section 1- ise 056 5. Section 1- % powered by ManleNet eement | Privacy Policy I Q 2000-2020 John Wiley & Sons, Inc. All Rights Reserved. A Division of John Wiley & Sons, Inc. MacBook Pro The I'm # 2$ 4. % 3 7 8. R D H 6. CD
Assignment
Gradebook
ORION
Downloadable eTextbook
ent
FULL SCREEN
PRINTER VERSION
1 BACK
NEXT
Chapter 6, Section 2-CI, Exercise 108
Plastic Microfiber Pollution on Shorelines
In a study, we see that plastic microparticles are contaminating the world's shorelines and that much of the pollution appears to come from fibers from washing polyester clothes. The same study also
took samples from ocean beaches. Five samples were taken from each of 18 different shorelines worldwide, for a total of 90 samples of size 250 mL. The mean number of plastic microparticles found
per 250 mL of sediment was 18.3 with a standard deviation of 8.2.
(a) Find a 90% confidence interval for the mean number of polyester microfibers per 250 mL of beach sediment.
Round your answers to two decimal places.
The 90% confidence interval is
to
(b) What is the margin of error?
Round your answer to two decimal places.
margin of error =
the absolute tolerance is +/-0.05
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Transcribed Image Text:Assignment Gradebook ORION Downloadable eTextbook ent FULL SCREEN PRINTER VERSION 1 BACK NEXT Chapter 6, Section 2-CI, Exercise 108 Plastic Microfiber Pollution on Shorelines In a study, we see that plastic microparticles are contaminating the world's shorelines and that much of the pollution appears to come from fibers from washing polyester clothes. The same study also took samples from ocean beaches. Five samples were taken from each of 18 different shorelines worldwide, for a total of 90 samples of size 250 mL. The mean number of plastic microparticles found per 250 mL of sediment was 18.3 with a standard deviation of 8.2. (a) Find a 90% confidence interval for the mean number of polyester microfibers per 250 mL of beach sediment. Round your answers to two decimal places. The 90% confidence interval is to (b) What is the margin of error? Round your answer to two decimal places. margin of error = the absolute tolerance is +/-0.05 I Privacy Policy I 2000-2020 John Wiley & Sons, Inc. All Rights Reserved. A Division of John Wiley & Sons. Inc. Version 4.24.20.1 MacBook Pro The I'm ** %23 2$ & * 2 3 4 aice 6. 8. 6. %3D delete R T. Y U- D F G J K .. return C M. mmand MOSISO command option B.
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