Astruggling friend out

an amusement park has opened a new roller coaster. it is so popular that people are waiting for up to 3 hours for a 2 minutes ride. concerned about how people who might be willing to wait in line for 3 hours feel about this, they survey the first 100 people as they enter the park.
- what kind of sample is this?
a) a convenience sample ( i chose this answer and it wasn’t correct)

b) cluster sample

c) simple random sample

d) census

B

It is a cluster sample choosing 100 first responders.

the data of the detroit pistons in numerical order from least to greatest is 0.30, 0.37, 0.55, 0.62, 0.69, 0.72, 0.73, 0.75, 0.77, 0.78, 0.80, 0.81, 0.81, 0.83, 0.84, 0.89

the data of the miami heat in numerical order from least to greatest is 0.50, 0.50, 0.56, 0.57, 0.67, 0.72, 0.72, 0.72, 0.75, 0.75, 0.76, 0.81, 0.82, 0.90, 1.00, 1.00

the detroit pistons median : 1.52

the miami heat median: 1.47

the iqr of this data is 0.05