Concentrations of a pollutant were measured at 25 locations in a lake after rains caused heavy runoff from surrounding areas. After a period of dry weather, they were measured again at the same locations. The data is attached in the image below.  (a) Perform an appropriate hypothesis testing to see if there is any effect of the runoff on pollutant concentrations. (b) Find a 90% confidence interval for the effect of runoff on pollutant concentrations.

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.CR: Chapter Review
Problem 37E: Find the positive geometric mean between 4 and 64.
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Concentrations of a pollutant were measured at 25 locations in a lake after rains caused heavy runoff
from surrounding areas. After a period of dry weather, they were measured again at the same
locations. The data is attached in the image below. 
(a) Perform an appropriate hypothesis testing to see if there is any effect of the runoff on pollutant
concentrations.
(b) Find a 90% confidence interval for the effect of runoff on pollutant concentrations.

"rainy" "dry"
0.1622 0.1515
0.1352 0.1237
0.0939 0.0735
0.1968 0.1151
0.1495 0.1158
0.1496 0.1125
0.0898 0.1192
0.1338 0.131
0.1737 0.0975
0.1333 0.0879
0.0672 0.0714
0.1777 0.1216
0.1316 0.1334
0.0709 0.1186
0.1914 0.1362
0.0973 0.0263
0.1781 0.0687
0.2268 0.1309
0.1492 0.1495
0.0342 0.0535
0.1511 0.0788
0.1503 0.1312
0.1062 0.1177
0.2072 0.157
0.1258 0.0883
Transcribed Image Text:"rainy" "dry" 0.1622 0.1515 0.1352 0.1237 0.0939 0.0735 0.1968 0.1151 0.1495 0.1158 0.1496 0.1125 0.0898 0.1192 0.1338 0.131 0.1737 0.0975 0.1333 0.0879 0.0672 0.0714 0.1777 0.1216 0.1316 0.1334 0.0709 0.1186 0.1914 0.1362 0.0973 0.0263 0.1781 0.0687 0.2268 0.1309 0.1492 0.1495 0.0342 0.0535 0.1511 0.0788 0.1503 0.1312 0.1062 0.1177 0.2072 0.157 0.1258 0.0883
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