SMS per day
2
4
5
5
5
5
6
7
7
8
8
9
10
10
10
10
20
20
25
25
27

# MS 150 Statistics quiz two • Name:

The table is a trimmed sample for the number of short message service (SMS) text messages sent per day by twenty-one students surveyed during the spring of 2008.

Helpful tip: Values equal to the class upper limit go into that class. That is, the class upper limit includes data "up to and including the class upper limit."

1. __________ What is the level of measurement?
2. __________ Find the sample size n.
3. __________ Find the minimum.
4. __________ Find the maximum.
5. __________ Find the range.
6. __________ If this data is divided into five classes, what is the width of a single class?
7. Determine the frequency and calculate the relative frequency using five classes. Record your results in the table provided.
SMS class upper limitsFrequency FRelative Frequency p(x)
Sums:
1. Sketch a frequency histogram of the data, labeling your horizontal axis and vertical axis as appropriate. Use the back of this sheet if necessary.
2. __________ What is the shape of the histogram?
3. __________ Do you have a cell phone?
4. __________ If you have a cell phone, about how many text messages do you send per day?
5. __________ If you have a cell phone, does the cell phone have a camera?
6. __________ If you have a cell phone, can you open web pages on your screen (WAP browser)?