Researchers Collected Samples Of Water From Streams In A Mountain Range To Investigate The Effects Of Acid Rain They Me 1 (18.62 KiB) Viewed 10 times
Researchers Collected Samples Of Water From Streams In A Mountain Range To Investigate The Effects Of Acid Rain They Me 2 (12.94 KiB) Viewed 10 times
Researchers collected samples of water from streams in a mountain range to investigate the effects of acid rain. They measured the pH (acidity) of the water and classified the streams with respect to the kind of substrate (type of rock over which they flow). A lower pH means the water is more acidic. The plot to the right shows the pH of the streams by substrate (limestone, mixed, or shale). Selected parts of a software analysis comparing pH of streams with limestone and mixed substrates are shown below. Complete parts a through c. 2-Sample t-test of t-Statistic 0.15 w/42 df, P=0.8815 ₂0. Difference Between Means0.540 a) State the null and alternative hypotheses for this test. Choose the correct answer below. OA HH-20HA HL-HM O OB. HoP-PM-0; H₁ H₂ PM 0 OC. Ho HL-HO, H₂-HL-HM-0 OD. HHL-50; H₁ H₂ PM 0 RO TA A 843 S iTune 1 odu
b) From the information you have, do the assumptions and conditions appear to be met? Which of the following conditions are satisfied for the given data? Select all that apply. A. Independent group assumption B. Independence ássumption C. Nearly normal condition c) What conclusion would you draw? Ho There strong evidence that the streams with limestone substrates have mean pH levels different from those of streams with mixed substrates.
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!