# Insufficient evidence to conclude that herbal

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Insufficient evidence to conclude that herbal supplements reduce blood pressure. (b) (DESIGN) State Significance Level of the test and explain what it means, α =.10, the maximum probability of making Type I error, which would be incorrectly claiming blood pressure was lowered. (c) (DESIGN) Determine the statistical model (test statistic) Matched pair t-test – dependent sampling. (d) DESIGN) Determine decision rule (pvalue method) Reject Ho if pvalue < α
12. A random sample of 25 waiting times (in minutes) before patients saw a medical professional in a hospital's minor emergency department had a standard deviation of 0.7 minute. After a new admissions procedure was implemented, a random sample of 21 waiting times had a standard deviation of 0.5 minute. At a = 0.10, can you support the hospital's claim that the standard deviation of the waiting times has decreased? (a) (DESIGN) State your Hypothesis (d) (DESIGN) Determine decision rule (critical value method) σ 2
(b) (DESIGN) State Significance Level of the test and explain what it means. (c) (DESIGN) Determine the statistical model (test statistic)
13. An engineer wants to compare the tensile strengths of steel bars that are produced using a conventional