Minor surgery on horses under field conditions requires a reliable short-term anesthetic producing good muscle relaxation, minimal cardiovascular and respiratory changes, and a quick, smooth recovery with minimal aftereffects so that horses can be left unattended. An article reports that for a sample of n = 73 horses to which ketamine was administered under certain conditions, the sample average lateral recumbency (lying-down) time was 18.95 min and the standard deviation was 8.1 min. Does this data suggest that true average lateral recumbency time under these conditions is less than 20 min? Test the appropriate hypotheses at level of significance 0.10. State the appropriate null and alternative hypotheses. H0: ? = 20 Ha: ? ≠ 20H0: ? ≠ 20 Ha: ? = 20 H0: ? ≠ 20 Ha: ? > 20H0: ? = 20 Ha: ? < 20 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value = State the conclusion in the problem context. Reject the null hypothesis. There is not sufficient evidence that the average lying-down time is less than 20 minutes.Do not reject the null hypothesis. There is not sufficient evidence that the average lying-down time is less than 20 minutes. Reject the null hypothesis. There is sufficient evidence that the average lying-down time is less than 20 minutes.Do not reject the null hypothesis. There is sufficient evidence that the average lying-down time is less than 20 minutes.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Minor surgery on horses under field conditions requires a reliable short-term anesthetic producing good muscle relaxation, minimal cardiovascular and respiratory changes, and a quick, smooth recovery with minimal aftereffects so that horses can be left unattended. An article reports that for a sample of n = 73 horses to which ketamine was administered under certain conditions, the sample average lateral recumbency (lying-down) time was 18.95 min and the standard deviation was 8.1 min. Does this data suggest that true average lateral recumbency time under these conditions is less than 20 min? Test the appropriate hypotheses at level of significance 0.10.
State the appropriate null and alternative hypotheses.

H₀: ? = 20
H_a: ? ≠ 20H₀: ? ≠ 20
H_a: ? = 20 H₀: ? ≠ 20
H_a: ? > 20H₀: ? = 20
H_a: ? < 20

Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.)

z	=
P-value	=

State the conclusion in the problem context.

Reject the null hypothesis. There is not sufficient evidence that the average lying-down time is less than 20 minutes.Do not reject the null hypothesis. There is not sufficient evidence that the average lying-down time is less than 20 minutes. Reject the null hypothesis. There is sufficient evidence that the average lying-down time is less than 20 minutes.Do not reject the null hypothesis. There is sufficient evidence that the average lying-down time is less than 20 minutes.

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