shaniahharrisoov3lqv

28.01.2020 • 

Mathematics

The ph of a liquid is a measure of its acidity or alkalinity. pure water has a ph of 7, which is neutral. solutions with a ph less than 7 are acidic while solutions with a ph greater than 7 are alkaline. a biologist was interested in testing the purity of lake water in florida. a random sample of 67 lakes was taken, and the ph of water in each lake was recorded. the sample of lakes has an average ph of 6.716 with a standard deviation of 2.196.
1. using a significance level of 0.10, is there evidence the mean ph of florida lakes is not neutral?
2. based on the decision of your test and the sample selected, what can you conclude?
othe mean ph of florida lakes is alkaline .
o the mean ph of florida lakes is acidic.
o the mean ph of florida lakes is neutral.

Ответ:

Jmarie08

14.06.2021

Mathematics

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Hello from MrBillDoesMath!

      y = -2

Discussion.  Using y= mx +b with m = 0, gives

y = b

But what is "b"? The line passes through the point (4,-2) so y = -2. Hence

y = -2

Thank you,

MrB

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