Do different types of hospitals have different practices when completing death certificates? A health official and her team compare the results of 24883 randomly selected autopsies to the causes of death listed on the certificates. Death certificates in the study came from three types of hospitals, public; private, for profit; and university hospitals. Of the 24883 death certificates evaluated, 6785 were confirmed to be accurate, 8140 contained errors but did not require recoding of the underlying cause of death, and 9958 were incorrect and required recoding. Data are shown as a 3×3 contingency table. Confirmed accurate Inaccurate, no change needed Incorrect, recoding needed All Public 997 1206 1493 3696 Private 2213 2670 3232 8115 University 3575 4264 5233 13072 All 6785 8140 9958 24883 The health official uses a chi‑square test of independence to evaluate her null and alternative hypotheses. ?0:There is no association between hospital type and death certificate status.?1:There is an association between hospital type and death certificate status. The value of her chi‑square test statistic ?2 is 0.484 with four degrees of freedom. Complete the analysis by computing the ?-value of the official’s test and then decide whether she should reject her null hypothesis when the significance level is ?=0.01. Compute the ?-value of the official’s test using software. Report your results to three decimal places. ?-value= Should the health official reject her null hypothesis if her significance level is ?=0.01? Yes. Since the ?-value of the test is less than the stated alpha level of 0.01, there is sufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated. No. Since the ?-value of the test is greater than the stated alpha level of 0.01, there is insufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated. No. Since the ?-value of the test is less than the stated alpha level of 0.01, there is insufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated. Yes. Since the ?-value of the test is greater than the stated alpha level of 0.01, there is sufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated.

Do different types of hospitals have different practices when completing death certificates? A health official and her team compare the results of 24883 randomly selected autopsies to the causes of death listed on the certificates. Death certificates in the study came from three types of hospitals, public; private, for profit; and university hospitals. Of the 24883 death certificates evaluated, 6785 were confirmed to be accurate, 8140 contained errors but did not require recoding of the underlying cause of death, and 9958 were incorrect and required recoding. Data are shown as a 3×3 contingency table. Confirmed accurate Inaccurate, no change needed Incorrect, recoding needed All Public 997 1206 1493 3696 Private 2213 2670 3232 8115 University 3575 4264 5233 13072 All 6785 8140 9958 24883 The health official uses a chi‑square test of independence to evaluate her null and alternative hypotheses. ?0:There is no association between hospital type and death certificate status.?1:There is an association between hospital type and death certificate status. The value of her chi‑square test statistic ?2 is 0.484 with four degrees of freedom. Complete the analysis by computing the ?-value of the official’s test and then decide whether she should reject her null hypothesis when the significance level is ?=0.01. Compute the ?-value of the official’s test using software. Report your results to three decimal places. ?-value= Should the health official reject her null hypothesis if her significance level is ?=0.01? Yes. Since the ?-value of the test is less than the stated alpha level of 0.01, there is sufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated. No. Since the ?-value of the test is greater than the stated alpha level of 0.01, there is insufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated. No. Since the ?-value of the test is less than the stated alpha level of 0.01, there is insufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated. Yes. Since the ?-value of the test is greater than the stated alpha level of 0.01, there is sufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Do different types of hospitals have different practices when completing death certificates?

A health official and her team compare the results of 24883 randomly selected autopsies to the causes of death listed on the certificates. Death certificates in the study came from three types of hospitals, public; private, for profit; and university hospitals. Of the 24883 death certificates evaluated, 6785 were confirmed to be accurate, 8140 contained errors but did not require recoding of the underlying cause of death, and 9958 were incorrect and required recoding.

Data are shown as a 3×3 contingency table.

	Confirmed accurate	Inaccurate, no change needed	Incorrect, recoding needed	All

Public	997	1206	1493	3696
Private	2213	2670	3232	8115
University	3575	4264	5233	13072
All	6785	8140	9958	24883

The health official uses a chi‑square test of independence to evaluate her null and alternative hypotheses.

?0:There is no association between hospital type and death certificate status.?1:There is an association between hospital type and death certificate status.

The value of her chi‑square test statistic ?2 is 0.484 with four degrees of freedom.

Complete the analysis by computing the ?-value of the official’s test and then decide whether she should reject her null hypothesis when the significance level is ?=0.01.

Compute the ?-value of the official’s test using software. Report your results to three decimal places.

?-value=

Should the health official reject her null hypothesis if her significance level is ?=0.01?

Yes. Since the ?-value of the test is less than the stated alpha level of 0.01, there is sufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated.

No. Since the ?-value of the test is greater than the stated alpha level of 0.01, there is insufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated.

No. Since the ?-value of the test is less than the stated alpha level of 0.01, there is insufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated.

Yes. Since the ?-value of the test is greater than the stated alpha level of 0.01, there is sufficient evidence to reject the null hypothesis that hospital type and death certificate status are unassociated.

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