The graph shows the distribution of the number of text messages young adults send per day. The distribution is approximately Normal, with

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


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