Paper Details

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-minute ride. Concerned about how patrons (who paid a large amount to enter the park and ride on the rides) feel about this, they survey every 10th person on the line for the roller coaster, starting from a randomly selected individual.

a) What kind of sample is this?

b) What is the sampling frame?

c) Is it likely to be representative?

d) What members of the population of interest are omitted?

Consider again the random variable described in Problems 2.2.2 and 2.3.10 with a probability density function of

F(x) = 1/x In (1.5)

for 4 < x < 6 and f(x) = 0 elsewhere.

(a) What is the variance of this random variable.

(b) What is the standard deviation of this random variable.

(c) Find the upper and lower quartiles of this random variable.

(d) What is the interquartile range?