Which interpretation is correct? O u1 is substantially greater than µ2, therefore the average sediment ammonium concentration is higher in the Corpus Christi Bay area. O u1 is substantially smaller than µ2, therefore the average sediment ammonium concentration is higher in the Corpus Christi Bay area. O u1 is similar to µ2, therefore the average sediment ammonium concentration is similar between the two areas.

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Confidence Interval for the Difference in Two Population Means
The seagrass Thalassia testudinum is an integral part of the Texas coastal
ecosystem. Essential to the growth of T. testudinum is ammonium. Researchers
K. Lee and K. Dunton of the Marine Science Institute of the University of Texas
at Austin noticed that the seagrass beds in Corpus Christi Bay were taller and
thicker than those in Lower Laguna Madre. They compared the sediment
ammonium concentrations in the two locations and published their findings in
Marine Ecology Progress Series (Vol. 196, pp. 39-48).
Suppose the 95% confidence interval for the difference in the average sediment
ammonium concentrations between Corpus Christi area and the Lower Laguna
Madre area were (70, 115).
Which interpretation is correct?
O u1 is substantially greater than µ2, therefore the average sediment ammonium
concentration is higher in the Corpus Christi Bay area.
O u1 is substantially smaller than µ2, therefore the average sediment ammonium
concentration is higher in the Corpus Christi Bay area.
O u1 is similar to µ2, therefore the average sediment ammonium concentration is similar
between the two areas.
Transcribed Image Text:Confidence Interval for the Difference in Two Population Means The seagrass Thalassia testudinum is an integral part of the Texas coastal ecosystem. Essential to the growth of T. testudinum is ammonium. Researchers K. Lee and K. Dunton of the Marine Science Institute of the University of Texas at Austin noticed that the seagrass beds in Corpus Christi Bay were taller and thicker than those in Lower Laguna Madre. They compared the sediment ammonium concentrations in the two locations and published their findings in Marine Ecology Progress Series (Vol. 196, pp. 39-48). Suppose the 95% confidence interval for the difference in the average sediment ammonium concentrations between Corpus Christi area and the Lower Laguna Madre area were (70, 115). Which interpretation is correct? O u1 is substantially greater than µ2, therefore the average sediment ammonium concentration is higher in the Corpus Christi Bay area. O u1 is substantially smaller than µ2, therefore the average sediment ammonium concentration is higher in the Corpus Christi Bay area. O u1 is similar to µ2, therefore the average sediment ammonium concentration is similar between the two areas.
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