Mercury analysis results performed on a drinking water sample are given in the table below. Analysis No 1 2 3 4 15 6 Mercury (ppb) 54.1 55.5 63.8 54.4 55.8 57.9 Which value is the average with the 90% confidence interval? (t = 2.02, s= 3.63) a) 56.9 + -3.0 b) 56.9 + -2.8 55.9 + -3.O 56.9 + -3.1 nc hiralc

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter7: Statistical Data Treatment And Evaluation
Section: Chapter Questions
Problem 7.16QAP
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20
Mercury analysis results performed on a drinking water
sample are given in the table below.
13
15
Analysis No1
Mercury
(ppb)
54.1 55.5 63.8
54.4
55.8 57.9
Which value is the average with the 90% confidence
interval? (t = 2.02,
s = 3.63)
a) O 56.9 ± -3.0
b) O 56.9 + -2.8
C) O 55.9 ± -3.0
d) O 56.9 ± -3.1
O Boş bırak
Transcribed Image Text:20 Mercury analysis results performed on a drinking water sample are given in the table below. 13 15 Analysis No1 Mercury (ppb) 54.1 55.5 63.8 54.4 55.8 57.9 Which value is the average with the 90% confidence interval? (t = 2.02, s = 3.63) a) O 56.9 ± -3.0 b) O 56.9 + -2.8 C) O 55.9 ± -3.0 d) O 56.9 ± -3.1 O Boş bırak
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