Variable Discrete Continuous c The number of personal teleph

Variable

Discrete

Continuous

(c) The number of personal telephone calls made tomorrow at Bingley Corporation

(d) The number of insects feeding on a tree leaf

Solution

(a) The intensity of a 1000-Hz tone judged by a participant to be \"equally as loud as\" a 500-Hz tone of 50 decibels is continuous variable because the decibels are a non-negative value.

(b) The actual length of a roll of plastic wrap advertised to be 30 feet long is discrete because this is a finite number

(c) The number of personal telephone calls made tomorrow at Bingley Corporation is a continuous variable because

we donot known that the corporation is made how much telephone calls

(d) The number of insects feeding on a tree leaf is a discrete variable because the number of insects is finite for a particular tree.