Minor surgery on horses under eld conditions requires a short-term anesthetic pr

Question

Minor surgery on horses under eld conditions requires a short-term anesthetic producing good muscle relaxation,
minimal cardiovascular and respiratory changes, and a quick, smooth recovery with minimal aftere ects so that
horses can be left unattended. The article A Field Trial of Ketamine Anesthesia in the Horse" reports that
a sample of n = 73 horses to which ketamine was administered under certain conditions, the sample average
lateral recumbency (lying-down) time was 18.86 minutes, and the standard deviation was 8.6 minutes. Do these
data suggest that true average lateral recumbency time under these conditions is less than 20 minutes? State
the appropriate hypotheses, compute the test statistic and compute the p-value. Make a conclusion based on the
p-value.

Explanation / Answer

n=73

sample mean=18.86

sd=8.6

mu=20

H0: mu=20

H1: mu<20

z=sample mean-mu/sd/sqrt(n))

p value is >0.05, so we accept the null hypothesis, and cocnlude that mu=20.

Hypothesis Test: Mean vs. Hypothesized Value 20.0000 hypothesized value 18.8600 mean label 8.6000 std. dev. 1.0066 std. error 73 n -1.13 z .1287 p-value (one-tailed, lower)

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

---