and thicker than those in Lower Laguna Mac ammonium concentration, in the two locations on sediment ammonium concentration, in o Equality of variances is not ass pou

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Researchers at UT Austin noticed that the seagrass beds in Corpus Cristi Bay (CCB)
were taller and thicker than those in Lower Laguna Madre (LLM). They compared the
sediment ammonium concentration, in the two locations. Following are the summary
statistics on sediment ammonium concentration, in micromoles, obtained by the
researchers. Equality of variances is not assumed.
CCB: X₁
115.1, s₁= 79.4, n₁ = 51
LLM: X₂ = 24.3, S₂ 10.5, n₂: 19
=
a. At the 1% significance level, is there sufficient evidence to conclude that the mean
sediment ammonium concentration in CCB exceeds that in LLM?
b. Determine a 98% confidence interval for the difference μ1-µ2, between the mean
sediment ammonium concentrations in CCB and LLM. Interpret your answer in (a)
in words.
c. Do the results in (a) and (b) provide the consistent results? Explain.
Transcribed Image Text:Researchers at UT Austin noticed that the seagrass beds in Corpus Cristi Bay (CCB) were taller and thicker than those in Lower Laguna Madre (LLM). They compared the sediment ammonium concentration, in the two locations. Following are the summary statistics on sediment ammonium concentration, in micromoles, obtained by the researchers. Equality of variances is not assumed. CCB: X₁ 115.1, s₁= 79.4, n₁ = 51 LLM: X₂ = 24.3, S₂ 10.5, n₂: 19 = a. At the 1% significance level, is there sufficient evidence to conclude that the mean sediment ammonium concentration in CCB exceeds that in LLM? b. Determine a 98% confidence interval for the difference μ1-µ2, between the mean sediment ammonium concentrations in CCB and LLM. Interpret your answer in (a) in words. c. Do the results in (a) and (b) provide the consistent results? Explain.
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