HIM 4331 - TEST #2 QUIZ 4-6 EXAM
QUESTIONS AND ANSWERS GRADED A+
2026
[[Quiz 4]]
1. The descriptive statistic most often used with normal and ordinal data is:
a. median
b. frequency distribution
c. z-test
d. confidence interval - ANS b. frequency distribution
2. the relationship between patient gender and readmission to the hospital is best displayed
using a:
a. frequency chart
b. contingency table
c. bar chart
d. pie chart - ANS b. contingency table
3. which of the following should be considered when selecting an alpha level for a hypothesis?
a. the cost of incorrectly rejecting the null hypothesis
b. alpha level is 0.05 based on statistical standards
c. the sample size and data type
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
, d. the proportion of successes observed in the data - ANS a. the cost of incorrectly rejecting
the null hypothesis
4. p-vaue is:
a. the statiscal proportion
b. the same as the alpha level
c. smallest type I for which the null hypothesis will be rejected
d. the power level of the test - ANS C. the smallest type I for which the null hypothesis will be
rejected
5. the inpatient mortality rate for congestive heart failure (CHF) was at 5% at a local hospital
during the last year. If 500 patients were admitted for CHF during the last year, how many of
these patients died? - ANS 25
(500*.05=25)
6. what is the proportion of patients that died in this sample of 10:
D, D, A, A, A, A, A, D, A , A - ANS 30%
(3/10=.3*100=30%)
7. Which of the following does not influence the level of type II error?
a. sample size
b. selection of test statistics
c. null hypothesis value
d. All of these influence type II error - ANS c. null hypothesis value
8. what is a binary variable?
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 2
QUESTIONS AND ANSWERS GRADED A+
2026
[[Quiz 4]]
1. The descriptive statistic most often used with normal and ordinal data is:
a. median
b. frequency distribution
c. z-test
d. confidence interval - ANS b. frequency distribution
2. the relationship between patient gender and readmission to the hospital is best displayed
using a:
a. frequency chart
b. contingency table
c. bar chart
d. pie chart - ANS b. contingency table
3. which of the following should be considered when selecting an alpha level for a hypothesis?
a. the cost of incorrectly rejecting the null hypothesis
b. alpha level is 0.05 based on statistical standards
c. the sample size and data type
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
, d. the proportion of successes observed in the data - ANS a. the cost of incorrectly rejecting
the null hypothesis
4. p-vaue is:
a. the statiscal proportion
b. the same as the alpha level
c. smallest type I for which the null hypothesis will be rejected
d. the power level of the test - ANS C. the smallest type I for which the null hypothesis will be
rejected
5. the inpatient mortality rate for congestive heart failure (CHF) was at 5% at a local hospital
during the last year. If 500 patients were admitted for CHF during the last year, how many of
these patients died? - ANS 25
(500*.05=25)
6. what is the proportion of patients that died in this sample of 10:
D, D, A, A, A, A, A, D, A , A - ANS 30%
(3/10=.3*100=30%)
7. Which of the following does not influence the level of type II error?
a. sample size
b. selection of test statistics
c. null hypothesis value
d. All of these influence type II error - ANS c. null hypothesis value
8. what is a binary variable?
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 2
