The graph shows the distribution of the number of text

messages young adults send per day. The distribution

is approximately Normal, with a mean of 128

messages and a standard deviation of 30 messages.

What percentage of young adults send between 68

and 158 text messages per day?

0 34%

47.5%

Daily Text Messaging

81.5%

0 95%

8

38

68

1188

218

248

98 128 158