Patients recovering from an appendix operation normally spend an average of 6.3

Question

Patients recovering from an appendix operation normally spend an average of 6.3 days in
the hospital. The distribution of recovery times is normal with a ? = 2.0 days. The hospital is
trying a new recovery program designed to lessen the time patients spend in the hospital. The
first 16 appendix patients in this new program were released from the hospital in an average of
5.3 days. On the basis of these data, can the hospital conclude that the new program has a
significant reduction of recovery time. Test at the .05 level of significance.

Summarize the data into the appropriate test statistic.
Steps:
Q6: What is the numeric value of your standard error?

Q7: What is the z-value or t-value you obtained (your test statistic)?

Q8: Based on your results (and comparing your Q7 and Q5 answers) would you
A. reject the null hypothesis
B. fail to reject the null hypothesis

Q9: The best conclusion for this example would be
A. There is no statistical difference in the amount of time appendix patients
spend in the hospital when comparing the new recovery program to the
population of patients on the traditional recovery program.
B. There is a statistical difference in the amount of time appendix patients spend
in the hospital when comparing the new recovery program to the population of
patients on the traditional recovery program.
C. The new appendix recovery program does not significantly reduce the number
of days spent in the hospital when compared to the population of patients on
the traditional recovery program.
D. The new appendix recovery program does significantly reduce the number of
days spent in the hospital when compared to the population of patients on the
traditional recovery program.

Q10: Based on your evaluation of the null in Q8 and your conclusion is Q9, as a researcher you
would be more concerned with a
A. Type I statistical error
B. Type II statistical error

Calculate the 95% confidence interval.
Steps:
Q11: The mean you will use for this calculation is
A. 5.3
B. 6.3
Q12: What is the new critical value you will use for this calculation?

Q13: As you know, two values will be required to complete the following equation:
__________ less than or equal to U less than or equal to __________

Explanation / Answer

I think this should go into the Statistics and Probability Section.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---