Refer to Exercise 10.21. Construct a 99% confidence interval for the difference in mean shear strengths for the two soil types.
a Is the value μ1 − μ2 = 0 inside or outside this interval?
b Based on the interval, should the null hypothesis discussed in Exercise 10.21 be rejected? Why?
c How does the conclusion that you reached compare with your conclusion in Exercise 10.21?
Shear strength measurements derived from unconfined compression tests for two types of soils gave the results shown in the following table (measurements in tons per square foot). Do the soils appear to differ with respect to average shear strength, at the 1% significance level?
Exercise leadership test 2 notes P.E.D.s The FDA determines the distinction between something being considered a drug vs. being considered a dietary supplement. This is based off of the FDA approval for safety and effectiveness. Dietary Supplement = product intended to supplement diet; containing one or more of the following ingredients: a vitamin, a mineral, an herb or other botanical, an amino acid Other qualifications of dietary supplements: dietary supplement used to increase total dietary intake a concentrate, a constituent, a metabolite, an extract, or a mixture of these must be intended for ingestion, and not intended for use as only food in a meal/diet Anabolic steroids = man made derivatives