The values 8, 5, 15, 13, 15, 9, 14, 7, 9, 15, 11, 10 are obtained from a random sample. Calculate the following:

a) The sample mean , the sample median , and the sample mode,

b) The sample variance 2 , and the sample standard deviation

c) Compute the interquartile range IQR

Global cryptocurrency ownership rates are estimated to be about 3.9%. Of those individuals that do own cryptocurrency, 58% are under the age of 34, and 79% are male. Consider a randomly selected individual from the global population.

a) If the selected individual does own cryptocurrency, what is the probability that they are over the age of 34?

b) What is the probability that the individual owns cryptocurrency and is under the age of 34?

c) What is the probability that the individual owns cryptocurrency and is female?