BMAT BMAT Data Analysis & Interpretation 2 — Questions and Answers
Question 1: A frequency histogram shows BMAT scores with most students scoring 55–65 and fewer students at the extremes. What does this distribution shape suggest?
- Uniform distribution
- Approximately normal distribution (Correct answer)
- Bimodal distribution
- Exponential distribution
Correct answer: Approximately normal distribution
A bell-shaped histogram with most scores near the center suggests an approximately normal distribution.
Question 2: In a BMAT data set, the interquartile range (IQR) is used to measure what?
- The total spread of all data
- The spread of the middle 50% of data (Correct answer)
- The difference between mean and median
- The range of the top 25% of scores
Correct answer: The spread of the middle 50% of data
The IQR is the difference between Q3 and Q1, representing the spread of the middle 50% of data.
Question 3: A table shows drug efficacy rates: Drug A=70%, Drug B=65%, Drug C=80%, Drug D=55%. Which drug has an efficacy exactly 25 percentage points above Drug D?
- Drug A
- Drug B
- Drug C (Correct answer)
- None of the above
Correct answer: Drug C
Drug D is 55%, and 55 + 25 = 80%, which equals Drug C's efficacy.
Question 4: In interpreting BMAT results, a p-value of 0.03 means:
- There is a 3% chance the result is correct
- There is a 3% probability of observing results this extreme if the null hypothesis is true (Correct answer)
- The study has 97% accuracy
- The effect size is small
Correct answer: There is a 3% probability of observing results this extreme if the null hypothesis is true
A p-value represents the probability of obtaining results at least as extreme as observed, assuming the null hypothesis is true.
Question 5: A clinical trial graph shows two treatment lines that intersect at week 6. What does this crossover suggest?
- Both treatments are equally effective overall
- One treatment becomes relatively more effective after week 6 (Correct answer)
- The trial should be stopped at week 6
- The data contains errors
Correct answer: One treatment becomes relatively more effective after week 6
An intersection indicates a crossover effect where the relative performance of the two treatments changes over time.
Question 6: Which graphical representation is BEST suited to showing the distribution of continuous BMAT scores?
- Bar chart
- Pie chart
- Histogram (Correct answer)
- Scatter plot
Correct answer: Histogram
Histograms are designed for continuous data, grouping values into bins to show frequency distribution.
BMAT BMAT Data Analysis & Interpretation 2
A frequency histogram shows BMAT scores with most students scoring 55–65 and fewer students at the extremes.
What does this distribution shape suggest?