52 For each of the following situations define an appropriat

5.2 For each of the following situations, define an appropriate random variable and state whether it is continuous or discrete. a An astronomer observes the number of stars in a quadrant of the sky. b A physician records the diastolic blood pressure of a study participant A former measures the diameter at breast height (dbh) of frees. d A pathologist is looking for signs of disease in blood samples.

Solution

(A)

Random variable : Number of stars

It is discrete variable.

(B)

Random variable: The diastolic blood pressure reading

It is continuos variable.

(C)

Random variable: The diameter at breast height

It is continuos variable.

(D)

Random variable: Signs of disease

It is discrete variable.