Kwan checks her email for new messages several times during the day.She realizes that because emails are sent on a ________________ schedule,checking her email more frequently will not increase the number of new emails she receives in a day.Furthermore,she knows that she cannot predict when people will email her,but if an email has been sent to her,she will receive it the next time she checks.
A)fixed-ratio
B)fixed-interval
C)variable-ratio
D)variable-interval

Question

Quizplus · Accepted Answer

Emails arrive on a variable-interval schedule because they are sent at unpredictable times, and checking more frequently does not affect the number of emails received.

Kwan Checks Her Email for New Messages Several Times During