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