Answer: unbiased; simple random sampling
Step-by-step explanation:
From the question, we are informed that John wanted to know about the popularity of a particular movie and that he surveyed 20% of the people in 5 different theaters.
This is an unbiased sample. This is because everybody at the theaters have an equal chance of being chosen by John.
Also, it's a simple random sampling. This is because a subset of the entire population is randomly selected.
The hang time will be the same because the amount of time spent in the air is dependent on the vertical height. The fact that the player covers horizontal distance is simply due to him also pushing forward, instead of only upwards.
Answer: 13
Step-by-step explanation: Add 10+1+1+1=13
