Health Statistics Questions & Answers

_______________ refers to the flatness of peakedness of one distribution in relation to another distribution A skewness B Correlation C Central tendency D Kurtosis - ANSWER: D Kurtosis A distribution is said to be positively skewed when the mean is A. bimodal. B. multimodal. C. shifted to the left. D. shifted to the right. - ANSWER: D A fetal death occurring during the 21st week of pregnancy, weighing 1,000 g is considered to be a (n) a. early fetal death b. preterm neonate c. intermediate fetal death d. late fetal death - ANSWER: D late fetal death A hospital reported the following statistics during a nonleap year. Calculate the percentage of occupancy for the entire year. Time Period Bed Count Inpatient Service Days January 1 - May 31 200 28,690 June 1 -October 15 250 27,400 October 1 6-December 31 275 19,250 A. 85.2% B. 88% C. 90.0% D. 91.2% - ANSWER: B (28,690 + 27,400 + 19,250) × 100 (151 × 200) + (137 × 250) + (77 × 275) = 88.0 = 88% A major disadvantage of cross-sectional studies is that A. the time sequence of exposure and disease is usually not known. B. they are usually more expensive and can take a long time to complete. C. prevalence rates cannot be calculated. D. they cannot provide information on both exposure and disease status in the same individual. - ANSWER: A A patient admitted to the hospital on January 24 and discharged on February 9 has a length of stay of A. 16 days. B. 15 days. C. 17 days. D. 14 days. - ANSWER: A 1/24 - 31 = 8 days + 2/1 through 2/8 = 8 days so 8 + 8 = 16 (Count day of admission but not discharge) A researcher has repeated the same study 10 times. Each time the study is repeated, the p value decreases. As the p value approaches zero, the: A. size of the sample increases. B. value of the study decreases. C. chance that the results are due to a sampling error decreases. D. chance that the results are due to a sampling error increases. - ANSWER: C A small portion of the form you are using for a research study is reproduced below. Male 1 Female 2 This is an example of A. ordinal data. B. ranked data. C. nominal data. D. discrete data. - ANSWER: C A study found that liver cancer rates per 100,000 males among cigarette smokers and nonsmokers in a major U.S. city were 48.0 and 25.4, respectively. The relative risk of developing liver cancer for male smokers compared to nonsmokers is A. 1.89. B. 15.6. C. 22.6. D. 48.0. - ANSWER: A RR = risk exposed divided by risk not exposed = 48 divided by 25.4 = 1.89 A transcription supervisor collected the data displayed above. What kind of data display is it? And, how many errors are attributed to skipped words? A. This is a Pareto diagram; twelve (12) errors were due to skipped words. B. This is a bar chart; eighteen (18) errors were due to skipped words. C. This is a Pareto diagram; eighteen (18) errors were due to skipped words. D. This is a bar chart; twelve (12) errors were due to skipped words. - ANSWER: A After the researchers see the number of subjects they will have to interview, they reexamine their criteria. The researchers could decrease the number of subjects while having the least impact on the reliability of the study by A. increasing p and decreasing B. B. increasing p or decreasing B. C. decreasing p and increasing B. D. decreasing p or increasing B. - ANSWER: D All of the following items mean the same thing, EXCEPT A. inpatient service day. B. daily inpatient census. C. daily census. D. inpatient census. - ANSWER: D All Women's Hospital reports the following statistics: Single births Vaginal 40 c-section 0 Twin births Twins—vaginal 12 (6 sets) Twins—c-section 8 (4 sets) Other multiple births 0 Intermediate fetal deaths Vaginal 5 c-section 0 Late fetal deaths Vaginal 2 c-section 0 How many deliveries occurred? A. 50 B. 57 C. 60 D. 67 - ANSWER: B 40 + 10 + 5 + 2 = 57 Average Daily Census - ANSWER: Total inpatient service days for a period (excluding newborns) ......................