For a family, the length of voicemails (v) is normally
distributed with a mean of 40 seconds and standard
deviation of 10 seconds. Find the probability that a
given voicemail is between 10 and 30 seconds.
-99.7%-
-95%-
-68%
1
10
1
1
1
20 30 40 50 60 70
P(10 Be sure to use the 68% - 95% -99.7% rule and do not round.
Enter