HPAT Numerical Reasoning and Data Analysis 2

Question 1

A hospital's quarterly surgery counts are Q1: 80, Q2: 100, Q3: 120, Q4: 100. What fraction of all surgeries for the year occurred in Q3?

Accepted Answer

3/10

Answer

1/4

Answer

1/3

Answer

2/5

Question 2

A patient's blood glucose (mg/dL) readings: 6am=90, 8am=160, 10am=130, 12pm=105, 2pm=95. Between which time interval did blood glucose decrease the most?

Accepted Answer

8am–10am

Answer

6am–8am

Answer

10am–12pm

Answer

12pm–2pm

Question 3

A study finds a correlation coefficient of −0.78 between weekly exercise hours and resting heart rate. What does this indicate?

Accepted Answer

Strong negative: more exercise is associated with lower resting heart rate

Answer

Strong positive: more exercise raises resting heart rate

Answer

Weak negative: exercise has minimal effect on heart rate

Answer

No meaningful relationship between exercise and heart rate

Question 4

In a study of 500 patients, 155 were exposed to factor Y. Of those exposed, 45 developed condition X. Of the 345 unexposed, 30 developed condition X. What is the approximate risk of developing condition X among those exposed?

Accepted Answer

29%

Answer

6%

Answer

9%

Answer

45%

Question 5

A hospital's infection rate dropped from 4.8% to 3.2% after implementing a new hygiene protocol. What is the absolute reduction in infection rate?

Accepted Answer

1.6 percentage points

Answer

0.16%

Answer

0.016%

Answer

16 percentage points

Question 6

A diagnostic test has 88% sensitivity and 92% specificity. If 200 patients who truly have the disease take the test, approximately how many will receive a false negative result?

Accepted Answer

24

Answer

8

Answer

16

Answer

88

Question 7

Drug A reduces symptoms in 70% of patients; Drug B in 55%. If 200 patients receive Drug A, how many MORE symptom improvements would be expected compared to the same group receiving Drug B?

Accepted Answer

30

Answer

15

Answer

20

Answer

25