Question

The number of vehicles entering each of 15 junctions from a motorway during a 20-minute period on a Sunday morning is given below.
7 26 30 26 19 22 12 30 8 28 8 15 26 32 4
1 Choose the option that gives the median number of vehicles entering a junction.
Options for Question
A 4 B 7 C 19.53 D 22 E 22.33 F 22.50
2 Choose the TWO options that give the lower and upper quartiles for the numbers of vehicles entering a junction.
Options for Question
A 5 B 7 C 8 D 10 E 27 F 28 G 29 H 32.50
3 Choose the option that gives the range of the numbers of vehicles entering a junction.
Options for Question
A 26 B 28 C 29 D 30 E 32 F 36

Answer 1

Arrange scores in order of value.

Median = 50% percentile (50% score below that point)

Lower quartile = 25% score below, 25th percentile

Upper Quartile = 75% score below, 75th percentile

Range = highest score - lowest score.

I'll let you do the calculations.