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For some reason people care about how acidic fresh water is. Two researchers conducted a study...

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Basic Math

For some reason people care about how acidic fresh water is. Tworesearchers conducted a study of

15 mountain lakes in the Southern Alps; any lake that has a pHgreater than 6 would be classfied as

"non-acidic." Below is a table of the pH levels from the 15lakes the researchers surveyed:

pH values of 15 Alpine Lakes

7.2 7.3 5.7

7.3 6.3 6.9

6.1 5.5 6.7

6.9 6.3 7.9

6.6 6.5 5.8

The standard deviation of the sample is given as: S = 0:672. Atthe 5% -level, does this sample

provide sufficient evidence to conclude that, on average, highmountain lakes in the Southern Alps are

non-acidic? State both null and alternative hypotheses,calculate and interpret your test statistic.

Answer & Explanation Solved by verified expert
3.7 Ratings (548 Votes)
Given that population meanu6 sample mean x 66 standard deviation s 06719 number n15 null Ho 6 alternate H1 6 level of significance alpha 005 from    See Answer
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