UCAT Numerical Data Interpretation 2

Question 1

A line graph shows patient satisfaction scores increasing from 68% in January to 82% in June. What is the percentage point increase?

Accepted Answer

14 pp

Answer

82% − 68% = 14 percentage points increase over the period.

Question 2

A table shows drug adverse-event rates: Drug X = 8 per 1,000 patients, Drug Y = 12 per 1,000 patients. What is the ratio of Drug X's rate to Drug Y's rate in simplest form?

Accepted Answer

2:3

Answer

8:12 simplifies to 2:3 by dividing both values by 4.

Question 3

A hospital's length of stay data shows: mean = 5.2 days, median = 4.0 days. What does the difference between mean and median suggest about the data?

Accepted Answer

The data is skewed by some very long stays

Answer

A mean much higher than the median indicates positive skew, suggesting a few patients with very long stays are pulling the mean up.

Question 4

A scatter plot shows a strong positive correlation between handwashing compliance (%) and patient-acquired infection rates. Which interpretation is correct?

Accepted Answer

Higher compliance is associated with more infections

Answer

A strong positive correlation means higher compliance is associated with higher infection rates — the question states a positive correlation, so both variables move in the same direction.

Question 5

Clinical trial data shows that a new drug reduced systolic blood pressure by an average of 12 mmHg with a 95% confidence interval of 10–14 mmHg. What does the confidence interval indicate?

Accepted Answer

We are 95% confident the true population effect lies between 10 and 14 mmHg

Answer

A 95% confidence interval means that if the study were repeated many times, 95% of such intervals would contain the true population effect.

UCAT University Clinical Aptitude Test Practice Practice Test

UCAT University Clinical Aptitude Test Practice Practice Test

UCAT Numerical Data Interpretation 2