Practice Test

Q1. Two data sets have the same mean but different spreads. Which statement must be true?

Their medians are equal
Their ranges are equal
Their values are identical
One set has more variation

Q2. A graph shows a sharp increase followed by a steady decrease. What does this most likely represent?

Constant growth
Random data
A peak followed by decline
No trend

Q3. Which average is most affected by extreme values?

Mean
Median
Mode
Range

Q4. Two dot plots are compared. One is tightly clustered, the other widely spread. Which statement is correct?

The first has greater range
The second has less variation
The first is more consistent
Both have equal spread

Q5. Which graph is best for showing change over time?

Pie chart
Column graph
Line graph
Dot plot