Q1: Soil pH is an important variable in the desien of structures that will contact the soil. Nine test samples of soil from a potential construction site gave readings of

7.3 6.5 6.4 6.1 6.0 6.5 6.2 5.8 6.7

Assuming that soil pH is normally distributed, we wish to test whether the average pHI value differs from 6.1 at significance level 0.05.

State the null and alternative hypotheses for the test.

State the formula for the test statistic and compute its value. Justify your answer.

Construct the rejection region and make a decision.

State a conclusion about the mean pH value of soil from the construction site, based on the test you performed.