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Mathematics, 10.06.2021 14:00 kellyzeissss9134
The number of texts per day by stud ents in a class is normally distrib uted with a
mean of 130 texts and a standard de viation of 20 texts. Identify all true statements.
1. A little more than 2% of the students text
under 90 times per day.
2. About 50% of the students text more than 130 times per day.
3. About 15% of the students send over 190 texts per day.
4. About 68% of the students text between 100 and 130 times.
5. A student texting 130 times per day would have a z score of 1.
6. A student texting 160 times falls between 1 and 2 standard devi ations from the mean.
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Answers: 2
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