Chapter 4 Review Questions

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Western Governors University *

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Statistics

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Feb 20, 2024

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What is the inpatient census for the following scenario? At the start of the week on Sunday, there were 150 inpatients. Throughout Monday, Tuesday, and Wednesday, 40% of the inpatients were discharged in total from on those three days combined. On Thursday 36 more patients were admitted into inpatient care. On Friday what was inpatient census? Correct Answer 126 150 You Answered 130 96 Question 2 0 / 1 pts If an analyst collects data to determine if the mortality rate at her facility is less than the state average p s, what are the appropriate null and alternative hypotheses? Correct Answer H0:p≥ps vs Ha: p<ps H0:p≠ps vs Ha: p=ps You Answered H0:p=ps vs Ha: p≠ps H0:p=ps vs Ha: p>ps Question 3 0 / 1 pts

What is the p value for the following scenario: Out of 300 male inpatients, there are 195 that have a MCC and out of 450 female inpatients 205 have a MCC. .59 Correct Answer .53 .49 You Answered .50 Question 4 0 / 1 pts Suppose we want to find the 95% confidence interval for the success of a COVID-19 trial vaccine. Based on the data p=0.55 and n=136. What are the upper and lower bounds of the 95% confidence interval? (0.46, 0.57) (0.46, 0.62) You Answered (0.50, 0.60) Correct Answer (0.47, 0.63) Question 5 1 / 1 pts A p -value is:

The same as the alpha level Correct! The smallest type I error for which the null hypothesis will be rejected The estimated proportion The power of a test Question 6 1 / 1 pts An analyst wishes to compare the proportion of patients receiving take home supplies upon discharge from two units of the hospital. He draws a sample of 25 patients from two units of the hospital and finds that 10 patients discharged from Unit A received take home supplies and 15 patients from Unit B received take home supplies. What statistical tool should be used to determine if the two proportions are different? Frequency table Correct! Two-sample Z-test for proportions Contingency table One-sample Z-test for proportions Question 7 1 / 1 pts A prevalence rate measures: The number of new cases of a disease in a period of time

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The number of people cured during a period of time Correct! The number of people in a population with a disease at a point in time The number of deaths at a hospital Question 8 0 / 1 pts The alpha level is: Correct Answer set before an analysis is complete You Answered always 0.05. never less than 0.01. set after the analysis is complete. Question 9 0 / 1 pts Which of the following variables should be summarized using a frequency distribution? Red blood cell count You Answered Diastolic blood pressure Correct Answer

CPT codes Charge per case Question 10 1 / 1 pts If the census at a hospital at midnight on May 29 th is 181 patients and three are discharged, four are admitted, and one dies in the emergency room prior to admission on May 30 th , what is the census on May 30 th ? 183 178 Correct! 182 181 Quiz Score: 4 out of 10 Previous Next

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